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	<id>https://cof.canolfanuwchgwyrfai.cymru/index.php?action=history&amp;feed=atom&amp;title=Cwm_y_Ffynnon</id>
	<title>Cwm y Ffynnon - Hanes golygu</title>
	<link rel="self" type="application/atom+xml" href="https://cof.canolfanuwchgwyrfai.cymru/index.php?action=history&amp;feed=atom&amp;title=Cwm_y_Ffynnon"/>
	<link rel="alternate" type="text/html" href="https://cof.canolfanuwchgwyrfai.cymru/index.php?title=Cwm_y_Ffynnon&amp;action=history"/>
	<updated>2026-05-06T14:32:27Z</updated>
	<subtitle>Hanes diwygio&#039;r dudalen hon ar y wici</subtitle>
	<generator>MediaWiki 1.43.1</generator>
	<entry>
		<id>https://cof.canolfanuwchgwyrfai.cymru/index.php?title=Cwm_y_Ffynnon&amp;diff=13190&amp;oldid=prev</id>
		<title>Cyfaill Eben am 14:19, 23 Mawrth 2022</title>
		<link rel="alternate" type="text/html" href="https://cof.canolfanuwchgwyrfai.cymru/index.php?title=Cwm_y_Ffynnon&amp;diff=13190&amp;oldid=prev"/>
		<updated>2022-03-23T14:19:37Z</updated>

		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;table style=&quot;background-color: #fff; color: #202122;&quot; data-mw=&quot;interface&quot;&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;tr class=&quot;diff-title&quot; lang=&quot;cy&quot;&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;← Fersiwn hŷn&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;Fersiwn yn ôl 15:19, 23 Mawrth 2022&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l1&quot;&gt;Llinell 1:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Llinell 1:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Mae &amp;#039;&amp;#039;&amp;#039;Cwm y Ffynnon&amp;#039;&amp;#039;&amp;#039; yn gwm rhewlifol rhwng [[Mynydd Tal-y-mignedd]] a [[Trum y Ddysgl|Thrum-y-ddysgl]]. Yn ei waelod mae Llyn Cwm-y-ffynnon, sydd yn darddiad nant sy&amp;#039;n rhedeg heibio i [[Tal-y-mignedd Uchaf|Dal-y-mignedd Uchaf]] gan ymuno wedyn ag [[Afon Drws-y-coed]].&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Mae &amp;#039;&amp;#039;&amp;#039;Cwm y Ffynnon&amp;#039;&amp;#039;&amp;#039; yn gwm rhewlifol rhwng [[Mynydd Tal-y-mignedd]] a [[Trum y Ddysgl|Thrum-y-ddysgl]]. Yn ei waelod mae Llyn Cwm-y-ffynnon, sydd yn darddiad nant sy&amp;#039;n rhedeg heibio i [[Tal-y-mignedd Uchaf|Dal-y-mignedd Uchaf]] gan ymuno wedyn ag [[Afon Drws-y-coed]].&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;−&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;Y mae &lt;/del&gt;dau adit neu fwynfa arbrofol lle chwilid am blwm a/neu gopr yn y 19g&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;., ar y llethr orllewinol&lt;/del&gt;.&amp;lt;ref&amp;gt;&#039;&#039;British Mining&#039;&#039;, Rhif 41, tt.49-50 [https://www.nmrs.org.uk/assets/pdf/BM41/BM41-41-59-sediment.pdf]&amp;lt;/ref&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;Ar y llethr orllewinol gwelir &lt;/ins&gt;dau adit&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;, &lt;/ins&gt;neu fwynfa arbrofol&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;, &lt;/ins&gt;lle chwilid am blwm a/neu gopr yn y 19g.&amp;lt;ref&amp;gt;&#039;&#039;British Mining&#039;&#039;, Rhif 41, tt.49-50 [https://www.nmrs.org.uk/assets/pdf/BM41/BM41-41-59-sediment.pdf]&amp;lt;/ref&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;  {{eginyn}}&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;  {{eginyn}}&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>Cyfaill Eben</name></author>
	</entry>
	<entry>
		<id>https://cof.canolfanuwchgwyrfai.cymru/index.php?title=Cwm_y_Ffynnon&amp;diff=10854&amp;oldid=prev</id>
		<title>Irion am 11:45, 15 Chwefror 2021</title>
		<link rel="alternate" type="text/html" href="https://cof.canolfanuwchgwyrfai.cymru/index.php?title=Cwm_y_Ffynnon&amp;diff=10854&amp;oldid=prev"/>
		<updated>2021-02-15T11:45:53Z</updated>

		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;table style=&quot;background-color: #fff; color: #202122;&quot; data-mw=&quot;interface&quot;&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;tr class=&quot;diff-title&quot; lang=&quot;cy&quot;&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;← Fersiwn hŷn&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;Fersiwn yn ôl 12:45, 15 Chwefror 2021&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l1&quot;&gt;Llinell 1:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Llinell 1:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;−&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Mae &#039;&#039;&#039;Cwm y Ffynnon&#039;&#039;&#039; yn gwm rhewlifol rhwng [[Mynydd Tal-y-mignedd]] a [[Trum y Ddysgl|&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;Trum&lt;/del&gt;-y-ddysgl]]. Yn ei waelod mae Llyn Cwm-y-ffynnon, sydd yn darddiad nant sy&#039;n rhedeg heibio i [[Tal-y-mignedd Uchaf|Dal-y-mignedd Uchaf]] gan ymuno wedyn ag [[Afon Drws-y-coed]].&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Mae &#039;&#039;&#039;Cwm y Ffynnon&#039;&#039;&#039; yn gwm rhewlifol rhwng [[Mynydd Tal-y-mignedd]] a [[Trum y Ddysgl|&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;Thrum&lt;/ins&gt;-y-ddysgl]]. Yn ei waelod mae Llyn Cwm-y-ffynnon, sydd yn darddiad nant sy&#039;n rhedeg heibio i [[Tal-y-mignedd Uchaf|Dal-y-mignedd Uchaf]] gan ymuno wedyn ag [[Afon Drws-y-coed]].&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Y mae dau adit neu fwynfa arbrofol lle chwilid am blwm a/neu gopr yn y 19g., ar y llethr orllewinol.&amp;lt;ref&amp;gt;&amp;#039;&amp;#039;British Mining&amp;#039;&amp;#039;, Rhif 41, tt.49-50 [https://www.nmrs.org.uk/assets/pdf/BM41/BM41-41-59-sediment.pdf]&amp;lt;/ref&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Y mae dau adit neu fwynfa arbrofol lle chwilid am blwm a/neu gopr yn y 19g., ar y llethr orllewinol.&amp;lt;ref&amp;gt;&amp;#039;&amp;#039;British Mining&amp;#039;&amp;#039;, Rhif 41, tt.49-50 [https://www.nmrs.org.uk/assets/pdf/BM41/BM41-41-59-sediment.pdf]&amp;lt;/ref&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l7&quot;&gt;Llinell 7:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Llinell 7:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;{{cyfeiriadau}}&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;{{cyfeiriadau}}&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[Categori:Daearyddiaeth ffisegol]]&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[Categori:Daearyddiaeth ffisegol]]&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-side-deleted&quot;&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;[[Categori:Mwyngloddio]]&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>Irion</name></author>
	</entry>
	<entry>
		<id>https://cof.canolfanuwchgwyrfai.cymru/index.php?title=Cwm_y_Ffynnon&amp;diff=10846&amp;oldid=prev</id>
		<title>Irion am 10:04, 15 Chwefror 2021</title>
		<link rel="alternate" type="text/html" href="https://cof.canolfanuwchgwyrfai.cymru/index.php?title=Cwm_y_Ffynnon&amp;diff=10846&amp;oldid=prev"/>
		<updated>2021-02-15T10:04:10Z</updated>

		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;table style=&quot;background-color: #fff; color: #202122;&quot; data-mw=&quot;interface&quot;&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;tr class=&quot;diff-title&quot; lang=&quot;cy&quot;&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;← Fersiwn hŷn&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;Fersiwn yn ôl 11:04, 15 Chwefror 2021&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l1&quot;&gt;Llinell 1:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Llinell 1:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Mae &amp;#039;&amp;#039;&amp;#039;Cwm y Ffynnon&amp;#039;&amp;#039;&amp;#039; yn gwm rhewlifol rhwng [[Mynydd Tal-y-mignedd]] a [[Trum y Ddysgl|Trum-y-ddysgl]]. Yn ei waelod mae Llyn Cwm-y-ffynnon, sydd yn darddiad nant sy&amp;#039;n rhedeg heibio i [[Tal-y-mignedd Uchaf|Dal-y-mignedd Uchaf]] gan ymuno wedyn ag [[Afon Drws-y-coed]].&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Mae &amp;#039;&amp;#039;&amp;#039;Cwm y Ffynnon&amp;#039;&amp;#039;&amp;#039; yn gwm rhewlifol rhwng [[Mynydd Tal-y-mignedd]] a [[Trum y Ddysgl|Trum-y-ddysgl]]. Yn ei waelod mae Llyn Cwm-y-ffynnon, sydd yn darddiad nant sy&amp;#039;n rhedeg heibio i [[Tal-y-mignedd Uchaf|Dal-y-mignedd Uchaf]] gan ymuno wedyn ag [[Afon Drws-y-coed]].&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;−&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt; &lt;/del&gt;Y mae dau adit neu fwynfa arbrofol lle chwilid am blwm a/neu gopr yn y 19g., ar y llethr orllewinol.&amp;lt;ref&amp;gt;&#039;&#039;British Mining&#039;&#039;, Rhif 41, tt.49-50 [https://www.nmrs.org.uk/assets/pdf/BM41/BM41-41-59-sediment.pdf]&amp;lt;/ref&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Y mae dau adit neu fwynfa arbrofol lle chwilid am blwm a/neu gopr yn y 19g., ar y llethr orllewinol.&amp;lt;ref&amp;gt;&#039;&#039;British Mining&#039;&#039;, Rhif 41, tt.49-50 [https://www.nmrs.org.uk/assets/pdf/BM41/BM41-41-59-sediment.pdf]&amp;lt;/ref&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;  {{eginyn}}&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;  {{eginyn}}&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>Irion</name></author>
	</entry>
	<entry>
		<id>https://cof.canolfanuwchgwyrfai.cymru/index.php?title=Cwm_y_Ffynnon&amp;diff=10845&amp;oldid=prev</id>
		<title>Irion am 10:03, 15 Chwefror 2021</title>
		<link rel="alternate" type="text/html" href="https://cof.canolfanuwchgwyrfai.cymru/index.php?title=Cwm_y_Ffynnon&amp;diff=10845&amp;oldid=prev"/>
		<updated>2021-02-15T10:03:59Z</updated>

		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;table style=&quot;background-color: #fff; color: #202122;&quot; data-mw=&quot;interface&quot;&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;tr class=&quot;diff-title&quot; lang=&quot;cy&quot;&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;← Fersiwn hŷn&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;Fersiwn yn ôl 11:03, 15 Chwefror 2021&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l1&quot;&gt;Llinell 1:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Llinell 1:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Mae &amp;#039;&amp;#039;&amp;#039;Cwm y Ffynnon&amp;#039;&amp;#039;&amp;#039; yn gwm rhewlifol rhwng [[Mynydd Tal-y-mignedd]] a [[Trum y Ddysgl|Trum-y-ddysgl]]. Yn ei waelod mae Llyn Cwm-y-ffynnon, sydd yn darddiad nant sy&amp;#039;n rhedeg heibio i [[Tal-y-mignedd Uchaf|Dal-y-mignedd Uchaf]] gan ymuno wedyn ag [[Afon Drws-y-coed]].&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Mae &amp;#039;&amp;#039;&amp;#039;Cwm y Ffynnon&amp;#039;&amp;#039;&amp;#039; yn gwm rhewlifol rhwng [[Mynydd Tal-y-mignedd]] a [[Trum y Ddysgl|Trum-y-ddysgl]]. Yn ei waelod mae Llyn Cwm-y-ffynnon, sydd yn darddiad nant sy&amp;#039;n rhedeg heibio i [[Tal-y-mignedd Uchaf|Dal-y-mignedd Uchaf]] gan ymuno wedyn ag [[Afon Drws-y-coed]].&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;−&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;Ar y llethr orllewinol, y &lt;/del&gt;mae dau adit neu fwynfa arbrofol lle chwilid am blwm a/neu gopr yn y 19g.&amp;lt;ref&amp;gt;&#039;&#039;British Mining&#039;&#039;, Rhif 41, tt.49-50 [https://www.nmrs.org.uk/assets/pdf/BM41/BM41-41-59-sediment.pdf]&amp;lt;/ref&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt; Y &lt;/ins&gt;mae dau adit neu fwynfa arbrofol lle chwilid am blwm a/neu gopr yn y 19g&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;., ar y llethr orllewinol&lt;/ins&gt;.&amp;lt;ref&amp;gt;&#039;&#039;British Mining&#039;&#039;, Rhif 41, tt.49-50 [https://www.nmrs.org.uk/assets/pdf/BM41/BM41-41-59-sediment.pdf]&amp;lt;/ref&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;  {{eginyn}}&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;  {{eginyn}}&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>Irion</name></author>
	</entry>
	<entry>
		<id>https://cof.canolfanuwchgwyrfai.cymru/index.php?title=Cwm_y_Ffynnon&amp;diff=10844&amp;oldid=prev</id>
		<title>Irion am 09:43, 15 Chwefror 2021</title>
		<link rel="alternate" type="text/html" href="https://cof.canolfanuwchgwyrfai.cymru/index.php?title=Cwm_y_Ffynnon&amp;diff=10844&amp;oldid=prev"/>
		<updated>2021-02-15T09:43:06Z</updated>

		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;table style=&quot;background-color: #fff; color: #202122;&quot; data-mw=&quot;interface&quot;&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;tr class=&quot;diff-title&quot; lang=&quot;cy&quot;&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;← Fersiwn hŷn&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;Fersiwn yn ôl 10:43, 15 Chwefror 2021&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l1&quot;&gt;Llinell 1:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Llinell 1:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;−&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Mae &#039;&#039;&#039;Cwm y Ffynnon&#039;&#039;&#039; yn gwm rhewlifol rhwng [[Mynydd Tal-y-mignedd]] a [[Trum y Ddysgl|Trum-y-ddysgl]]. Yn ei waelod mae Llyn Cwm-y-ffynnon, sydd yn darddiad &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;[[Afon Tal-y-mignedd]] &lt;/del&gt;sy&#039;n rhedeg heibio i [[Tal-y-mignedd Uchaf|Dal-y-mignedd Uchaf]] gan ymuno wedyn ag [[Afon Drws-y-coed]].&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Mae &#039;&#039;&#039;Cwm y Ffynnon&#039;&#039;&#039; yn gwm rhewlifol rhwng [[Mynydd Tal-y-mignedd]] a [[Trum y Ddysgl|Trum-y-ddysgl]]. Yn ei waelod mae Llyn Cwm-y-ffynnon, sydd yn darddiad &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;nant &lt;/ins&gt;sy&#039;n rhedeg heibio i [[Tal-y-mignedd Uchaf|Dal-y-mignedd Uchaf]] gan ymuno wedyn ag [[Afon Drws-y-coed]].&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Ar y llethr orllewinol, y mae dau adit neu fwynfa arbrofol lle chwilid am blwm a/neu gopr yn y 19g.&amp;lt;ref&amp;gt;&amp;#039;&amp;#039;British Mining&amp;#039;&amp;#039;, Rhif 41, tt.49-50 [https://www.nmrs.org.uk/assets/pdf/BM41/BM41-41-59-sediment.pdf]&amp;lt;/ref&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Ar y llethr orllewinol, y mae dau adit neu fwynfa arbrofol lle chwilid am blwm a/neu gopr yn y 19g.&amp;lt;ref&amp;gt;&amp;#039;&amp;#039;British Mining&amp;#039;&amp;#039;, Rhif 41, tt.49-50 [https://www.nmrs.org.uk/assets/pdf/BM41/BM41-41-59-sediment.pdf]&amp;lt;/ref&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>Irion</name></author>
	</entry>
	<entry>
		<id>https://cof.canolfanuwchgwyrfai.cymru/index.php?title=Cwm_y_Ffynnon&amp;diff=10842&amp;oldid=prev</id>
		<title>Irion am 09:37, 15 Chwefror 2021</title>
		<link rel="alternate" type="text/html" href="https://cof.canolfanuwchgwyrfai.cymru/index.php?title=Cwm_y_Ffynnon&amp;diff=10842&amp;oldid=prev"/>
		<updated>2021-02-15T09:37:27Z</updated>

		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;table style=&quot;background-color: #fff; color: #202122;&quot; data-mw=&quot;interface&quot;&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;tr class=&quot;diff-title&quot; lang=&quot;cy&quot;&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;← Fersiwn hŷn&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;Fersiwn yn ôl 10:37, 15 Chwefror 2021&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l1&quot;&gt;Llinell 1:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Llinell 1:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;−&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Mae &#039;&#039;&#039;Cwm y Ffynnon&#039;&#039;&#039; yn gwm rhewlifol rhwng [[Mynydd Tal-y-mignedd]] a [[Trum y Ddysgl|Trum-y-ddysgl]]. Yn ei waelod mae Llyn Cwm-y-ffynnon, sydd yn darddiad &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;anant &lt;/del&gt;sy&#039;n rhedeg heibio i [[Tal-y-mignedd Uchaf|Dal-y-mignedd Uchaf]] gan ymuno wedyn ag [[Afon Drws-y-coed]].&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Mae &#039;&#039;&#039;Cwm y Ffynnon&#039;&#039;&#039; yn gwm rhewlifol rhwng [[Mynydd Tal-y-mignedd]] a [[Trum y Ddysgl|Trum-y-ddysgl]]. Yn ei waelod mae Llyn Cwm-y-ffynnon, sydd yn darddiad &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;[[Afon Tal-y-mignedd]] &lt;/ins&gt;sy&#039;n rhedeg heibio i [[Tal-y-mignedd Uchaf|Dal-y-mignedd Uchaf]] gan ymuno wedyn ag [[Afon Drws-y-coed]].&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Ar y llethr orllewinol, y mae dau adit neu fwynfa arbrofol lle chwilid am blwm a/neu gopr yn y 19g.&amp;lt;ref&amp;gt;&amp;#039;&amp;#039;British Mining&amp;#039;&amp;#039;, Rhif 41, tt.49-50 [https://www.nmrs.org.uk/assets/pdf/BM41/BM41-41-59-sediment.pdf]&amp;lt;/ref&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Ar y llethr orllewinol, y mae dau adit neu fwynfa arbrofol lle chwilid am blwm a/neu gopr yn y 19g.&amp;lt;ref&amp;gt;&amp;#039;&amp;#039;British Mining&amp;#039;&amp;#039;, Rhif 41, tt.49-50 [https://www.nmrs.org.uk/assets/pdf/BM41/BM41-41-59-sediment.pdf]&amp;lt;/ref&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>Irion</name></author>
	</entry>
	<entry>
		<id>https://cof.canolfanuwchgwyrfai.cymru/index.php?title=Cwm_y_Ffynnon&amp;diff=10841&amp;oldid=prev</id>
		<title>Irion am 09:36, 15 Chwefror 2021</title>
		<link rel="alternate" type="text/html" href="https://cof.canolfanuwchgwyrfai.cymru/index.php?title=Cwm_y_Ffynnon&amp;diff=10841&amp;oldid=prev"/>
		<updated>2021-02-15T09:36:28Z</updated>

		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;table style=&quot;background-color: #fff; color: #202122;&quot; data-mw=&quot;interface&quot;&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;tr class=&quot;diff-title&quot; lang=&quot;cy&quot;&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;← Fersiwn hŷn&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;Fersiwn yn ôl 10:36, 15 Chwefror 2021&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l1&quot;&gt;Llinell 1:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Llinell 1:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;−&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Mae &#039;&#039;&#039;Cwm y Ffynnon&#039;&#039;&#039; yn gwm rhewlifol rhwng [[Mynydd Tal-y-mignedd]] a [[Trum&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;- &lt;/del&gt;y&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;-&lt;/del&gt;Ddysgl|Trum-y-ddysgl]]. Yn ei waelod mae Llyn Cwm-y-ffynnon, sydd yn darddiad anant sy&#039;n rhedeg heibio i [[Tal-y-mignedd Uchaf|Dal-y-mignedd Uchaf]] gan ymuno wedyn ag [[Afon Drws-y-coed]].&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Mae &#039;&#039;&#039;Cwm y Ffynnon&#039;&#039;&#039; yn gwm rhewlifol rhwng [[Mynydd Tal-y-mignedd]] a [[Trum y Ddysgl|Trum-y-ddysgl]]. Yn ei waelod mae Llyn Cwm-y-ffynnon, sydd yn darddiad anant sy&#039;n rhedeg heibio i [[Tal-y-mignedd Uchaf|Dal-y-mignedd Uchaf]] gan ymuno wedyn ag [[Afon Drws-y-coed]].&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Ar y llethr orllewinol, y mae dau adit neu fwynfa arbrofol lle chwilid am blwm a/neu gopr yn y 19g.&amp;lt;ref&amp;gt;&amp;#039;&amp;#039;British Mining&amp;#039;&amp;#039;, Rhif 41, tt.49-50 [https://www.nmrs.org.uk/assets/pdf/BM41/BM41-41-59-sediment.pdf]&amp;lt;/ref&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Ar y llethr orllewinol, y mae dau adit neu fwynfa arbrofol lle chwilid am blwm a/neu gopr yn y 19g.&amp;lt;ref&amp;gt;&amp;#039;&amp;#039;British Mining&amp;#039;&amp;#039;, Rhif 41, tt.49-50 [https://www.nmrs.org.uk/assets/pdf/BM41/BM41-41-59-sediment.pdf]&amp;lt;/ref&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>Irion</name></author>
	</entry>
	<entry>
		<id>https://cof.canolfanuwchgwyrfai.cymru/index.php?title=Cwm_y_Ffynnon&amp;diff=10840&amp;oldid=prev</id>
		<title>Irion am 09:36, 15 Chwefror 2021</title>
		<link rel="alternate" type="text/html" href="https://cof.canolfanuwchgwyrfai.cymru/index.php?title=Cwm_y_Ffynnon&amp;diff=10840&amp;oldid=prev"/>
		<updated>2021-02-15T09:36:09Z</updated>

		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;table style=&quot;background-color: #fff; color: #202122;&quot; data-mw=&quot;interface&quot;&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;tr class=&quot;diff-title&quot; lang=&quot;cy&quot;&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;← Fersiwn hŷn&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;Fersiwn yn ôl 10:36, 15 Chwefror 2021&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l1&quot;&gt;Llinell 1:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Llinell 1:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;−&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Mae &#039;&#039;&#039;Cwm y Ffynnon&#039;&#039;&#039; yn gwm rhewlifol rhwng [[Mynydd Tal-y-&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;Mignedd&lt;/del&gt;]] a [[Trum- y-Ddysgl|Trum-y-ddysgl]]. Yn ei waelod mae Llyn Cwm-y-ffynnon, sydd yn darddiad anant sy&#039;n rhedeg heibio i [[Tal-y-mignedd Uchaf|Dal-y-mignedd Uchaf]] gan ymuno wedyn ag [[Afon Drws-y-coed]].&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Mae &#039;&#039;&#039;Cwm y Ffynnon&#039;&#039;&#039; yn gwm rhewlifol rhwng [[Mynydd Tal-y-&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;mignedd&lt;/ins&gt;]] a [[Trum- y-Ddysgl|Trum-y-ddysgl]]. Yn ei waelod mae Llyn Cwm-y-ffynnon, sydd yn darddiad anant sy&#039;n rhedeg heibio i [[Tal-y-mignedd Uchaf|Dal-y-mignedd Uchaf]] gan ymuno wedyn ag [[Afon Drws-y-coed]].&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Ar y llethr orllewinol, y mae dau adit neu fwynfa arbrofol lle chwilid am blwm a/neu gopr yn y 19g.&amp;lt;ref&amp;gt;&amp;#039;&amp;#039;British Mining&amp;#039;&amp;#039;, Rhif 41, tt.49-50 [https://www.nmrs.org.uk/assets/pdf/BM41/BM41-41-59-sediment.pdf]&amp;lt;/ref&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Ar y llethr orllewinol, y mae dau adit neu fwynfa arbrofol lle chwilid am blwm a/neu gopr yn y 19g.&amp;lt;ref&amp;gt;&amp;#039;&amp;#039;British Mining&amp;#039;&amp;#039;, Rhif 41, tt.49-50 [https://www.nmrs.org.uk/assets/pdf/BM41/BM41-41-59-sediment.pdf]&amp;lt;/ref&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>Irion</name></author>
	</entry>
	<entry>
		<id>https://cof.canolfanuwchgwyrfai.cymru/index.php?title=Cwm_y_Ffynnon&amp;diff=10839&amp;oldid=prev</id>
		<title>Irion: Crëwyd tudalen newydd yn dechrau gyda &#039;Mae &#039;&#039;&#039;Cwm y Ffynnon&#039;&#039;&#039; yn gwm rhewlifol rhwng Mynydd Tal-y-Mignedd a Trum-y-ddysgl. Yn ei waelod mae Llyn Cwm-y-ffynnon, sydd yn d...&#039;</title>
		<link rel="alternate" type="text/html" href="https://cof.canolfanuwchgwyrfai.cymru/index.php?title=Cwm_y_Ffynnon&amp;diff=10839&amp;oldid=prev"/>
		<updated>2021-02-15T09:35:43Z</updated>

		<summary type="html">&lt;p&gt;Crëwyd tudalen newydd yn dechrau gyda &amp;#039;Mae &amp;#039;&amp;#039;&amp;#039;Cwm y Ffynnon&amp;#039;&amp;#039;&amp;#039; yn gwm rhewlifol rhwng &lt;a href=&quot;/index.php?title=Mynydd_Tal-y-Mignedd&amp;amp;action=edit&amp;amp;redlink=1&quot; class=&quot;new&quot; title=&quot;Mynydd Tal-y-Mignedd (nid yw&amp;#039;r dudalen yn bodoli)&quot;&gt;Mynydd Tal-y-Mignedd&lt;/a&gt; a &lt;a href=&quot;/index.php?title=Trum-_y-Ddysgl&amp;amp;action=edit&amp;amp;redlink=1&quot; class=&quot;new&quot; title=&quot;Trum- y-Ddysgl (nid yw&amp;#039;r dudalen yn bodoli)&quot;&gt;Trum-y-ddysgl&lt;/a&gt;. Yn ei waelod mae Llyn Cwm-y-ffynnon, sydd yn d...&amp;#039;&lt;/p&gt;
&lt;p&gt;&lt;b&gt;Tudalen newydd&lt;/b&gt;&lt;/p&gt;&lt;div&gt;Mae &amp;#039;&amp;#039;&amp;#039;Cwm y Ffynnon&amp;#039;&amp;#039;&amp;#039; yn gwm rhewlifol rhwng [[Mynydd Tal-y-Mignedd]] a [[Trum- y-Ddysgl|Trum-y-ddysgl]]. Yn ei waelod mae Llyn Cwm-y-ffynnon, sydd yn darddiad anant sy&amp;#039;n rhedeg heibio i [[Tal-y-mignedd Uchaf|Dal-y-mignedd Uchaf]] gan ymuno wedyn ag [[Afon Drws-y-coed]].&lt;br /&gt;
&lt;br /&gt;
Ar y llethr orllewinol, y mae dau adit neu fwynfa arbrofol lle chwilid am blwm a/neu gopr yn y 19g.&amp;lt;ref&amp;gt;&amp;#039;&amp;#039;British Mining&amp;#039;&amp;#039;, Rhif 41, tt.49-50 [https://www.nmrs.org.uk/assets/pdf/BM41/BM41-41-59-sediment.pdf]&amp;lt;/ref&amp;gt;&lt;br /&gt;
&lt;br /&gt;
 {{eginyn}}&lt;br /&gt;
==Cyfeiriadau==&lt;br /&gt;
{{cyfeiriadau}}&lt;br /&gt;
[[Categori:Daearyddiaeth ffisegol]]&lt;/div&gt;</summary>
		<author><name>Irion</name></author>
	</entry>
</feed>