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	<id>https://cof.canolfanuwchgwyrfai.cymru/index.php?action=history&amp;feed=atom&amp;title=Cwm_Tal-y-mignedd</id>
	<title>Cwm Tal-y-mignedd - 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_Tal-y-mignedd"/>
	<link rel="alternate" type="text/html" href="https://cof.canolfanuwchgwyrfai.cymru/index.php?title=Cwm_Tal-y-mignedd&amp;action=history"/>
	<updated>2026-06-22T04:03:14Z</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_Tal-y-mignedd&amp;diff=10888&amp;oldid=prev</id>
		<title>Cyfaill Eben am 14:24, 16 Chwefror 2021</title>
		<link rel="alternate" type="text/html" href="https://cof.canolfanuwchgwyrfai.cymru/index.php?title=Cwm_Tal-y-mignedd&amp;diff=10888&amp;oldid=prev"/>
		<updated>2021-02-16T14:24:00Z</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 15:24, 16 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;Cwm rhewlifol mwyaf dwyreiniol ochr ddeheuol [[Dyffryn Nantlle]] yw &#039;&#039;&#039;Cwm Tal-y-mignedd&#039;&#039;&#039;. Mae&#039;n gorwedd yng ngheseiliau gogleddol mynyddoedd [[Clogwyn y Barcut]], [[Y Garn]], [[Mynydd Drws-y-coed]] a [[Trum y Ddysgl|Thrum y Ddysgl]]. Rhed un gangen o [[Afon Gelli-dywyll]] ar hyd-&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;ddi&lt;/del&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;Cwm rhewlifol mwyaf dwyreiniol ochr ddeheuol [[Dyffryn Nantlle]] yw &#039;&#039;&#039;Cwm Tal-y-mignedd&#039;&#039;&#039;. Mae&#039;n gorwedd yng ngheseiliau gogleddol mynyddoedd [[Clogwyn y Barcut]], [[Y Garn]], [[Mynydd Drws-y-coed]] a [[Trum y Ddysgl|Thrum y Ddysgl]]. Rhed un gangen o [[Afon Gelli-dywyll]] ar hyd-&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;ddo&lt;/ins&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;Mae yna hen weithfeydd copr a haearn ar ystlys ddwyreiniol y cwm ar lethrau Clogwyn y Barcut.&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;Mae yna hen weithfeydd copr a haearn ar ystlys ddwyreiniol y cwm ar lethrau Clogwyn y Barcut.&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>Cyfaill Eben</name></author>
	</entry>
	<entry>
		<id>https://cof.canolfanuwchgwyrfai.cymru/index.php?title=Cwm_Tal-y-mignedd&amp;diff=10858&amp;oldid=prev</id>
		<title>Irion am 13:11, 15 Chwefror 2021</title>
		<link rel="alternate" type="text/html" href="https://cof.canolfanuwchgwyrfai.cymru/index.php?title=Cwm_Tal-y-mignedd&amp;diff=10858&amp;oldid=prev"/>
		<updated>2021-02-15T13:11:29Z</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 14:11, 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;Cwm rhewlifol mwyaf dwyreiniol ochr ddeheuol [[Dyffryn Nantlle]] yw &#039;&#039;&#039;Cwm Tal-y-mignedd&#039;&#039;&#039;. Mae&#039;n gorwedd yng ngheseiliau &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;gogkeddol &lt;/del&gt;mynyddoedd [[Clogwyn y Barcut]], [[Y Garn]], [[Mynydd Drws-y-coed]] a [[Trum y Ddysgl|Thrum y Ddysgl]]. Rhed un gangen o [[Afon Gelli-dywyll]] ar hyd-ddi.  &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;Cwm rhewlifol mwyaf dwyreiniol ochr ddeheuol [[Dyffryn Nantlle]] yw &#039;&#039;&#039;Cwm Tal-y-mignedd&#039;&#039;&#039;. Mae&#039;n gorwedd yng ngheseiliau &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;gogleddol &lt;/ins&gt;mynyddoedd [[Clogwyn y Barcut]], [[Y Garn]], [[Mynydd Drws-y-coed]] a [[Trum y Ddysgl|Thrum y Ddysgl]]. Rhed un gangen o [[Afon Gelli-dywyll]] ar hyd-ddi.  &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;Mae yna hen weithfeydd copr a haearn ar ystlys ddwyreiniol y cwm ar lethrau Clogwyn y &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;Barcud&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;Mae yna hen weithfeydd copr a haearn ar ystlys ddwyreiniol y cwm ar lethrau Clogwyn y &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;Barcut&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_Tal-y-mignedd&amp;diff=10857&amp;oldid=prev</id>
		<title>Irion am 11:48, 15 Chwefror 2021</title>
		<link rel="alternate" type="text/html" href="https://cof.canolfanuwchgwyrfai.cymru/index.php?title=Cwm_Tal-y-mignedd&amp;diff=10857&amp;oldid=prev"/>
		<updated>2021-02-15T11:48:44Z</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 12:48, 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;Cwm rhewlifol mwyaf dwyreiniol ochr ddeheuol [[Dyffryn Nantlle]] yw &#039;&#039;&#039;Cwm Tal-y-mignedd&#039;&#039;&#039;. Mae&#039;n gorwedd yng ngheseiliau gogkeddol mynyddoedd [[Clogwyn y &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;Barcud&lt;/del&gt;]], [[Y Garn]], [[Mynydd Drws-y-coed]] a [[Trum y Ddysgl|Thrum y Ddysgl]]. Rhed un gangen o [[Afon Gelli-dywyll]] ar hyd-ddi.  &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;Cwm rhewlifol mwyaf dwyreiniol ochr ddeheuol [[Dyffryn Nantlle]] yw &#039;&#039;&#039;Cwm Tal-y-mignedd&#039;&#039;&#039;. Mae&#039;n gorwedd yng ngheseiliau gogkeddol mynyddoedd [[Clogwyn y &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;Barcut&lt;/ins&gt;]], [[Y Garn]], [[Mynydd Drws-y-coed]] a [[Trum y Ddysgl|Thrum y Ddysgl]]. Rhed un gangen o [[Afon Gelli-dywyll]] ar hyd-ddi.  &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;Mae yna hen weithfeydd copr a haearn ar ystlys ddwyreiniol y cwm ar lethrau Clogwyn y Barcud.&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;Mae yna hen weithfeydd copr a haearn ar ystlys ddwyreiniol y cwm ar lethrau Clogwyn y Barcud.&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_Tal-y-mignedd&amp;diff=10856&amp;oldid=prev</id>
		<title>Irion am 11:46, 15 Chwefror 2021</title>
		<link rel="alternate" type="text/html" href="https://cof.canolfanuwchgwyrfai.cymru/index.php?title=Cwm_Tal-y-mignedd&amp;diff=10856&amp;oldid=prev"/>
		<updated>2021-02-15T11:46:39Z</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 12:46, 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;Cwm rhewlifol mwyaf dwyreiniol ochr ddeheuol [[Dyffryn Nantlle]] yw &amp;#039;&amp;#039;&amp;#039;Cwm Tal-y-mignedd&amp;#039;&amp;#039;&amp;#039;. Mae&amp;#039;n gorwedd yng ngheseiliau gogkeddol mynyddoedd [[Clogwyn y Barcud]], [[Y Garn]], [[Mynydd Drws-y-coed]] a [[Trum y Ddysgl|Thrum y Ddysgl]]. Rhed un gangen o [[Afon Gelli-dywyll]] ar hyd-ddi.  &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;Cwm rhewlifol mwyaf dwyreiniol ochr ddeheuol [[Dyffryn Nantlle]] yw &amp;#039;&amp;#039;&amp;#039;Cwm Tal-y-mignedd&amp;#039;&amp;#039;&amp;#039;. Mae&amp;#039;n gorwedd yng ngheseiliau gogkeddol mynyddoedd [[Clogwyn y Barcud]], [[Y Garn]], [[Mynydd Drws-y-coed]] a [[Trum y Ddysgl|Thrum y Ddysgl]]. Rhed un gangen o [[Afon Gelli-dywyll]] ar hyd-ddi.  &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;Mae yna hen weithfeydd copr a haearn ar ystlys ddwyreiniol y cwm ar lethrau Clogwyn y Barcud.&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;&amp;lt;ref&amp;gt;&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]&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;&amp;lt;/ref&amp;gt;&lt;/del&gt;&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;Mae yna hen weithfeydd copr a haearn ar ystlys ddwyreiniol y cwm ar lethrau Clogwyn y Barcud.&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_Tal-y-mignedd&amp;diff=10855&amp;oldid=prev</id>
		<title>Irion am 11:46, 15 Chwefror 2021</title>
		<link rel="alternate" type="text/html" href="https://cof.canolfanuwchgwyrfai.cymru/index.php?title=Cwm_Tal-y-mignedd&amp;diff=10855&amp;oldid=prev"/>
		<updated>2021-02-15T11:46:21Z</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 12:46, 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;Cwm rhewlifol mwyaf dwyreiniol ochr ddeheuol [[Dyffryn Nantlle]] yw &amp;#039;&amp;#039;&amp;#039;Cwm Tal-y-mignedd&amp;#039;&amp;#039;&amp;#039;. Mae&amp;#039;n gorwedd yng ngheseiliau gogkeddol mynyddoedd [[Clogwyn y Barcud]], [[Y Garn]], [[Mynydd Drws-y-coed]] a [[Trum y Ddysgl|Thrum y Ddysgl]]. Rhed un gangen o [[Afon Gelli-dywyll]] ar hyd-ddi.  &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;Cwm rhewlifol mwyaf dwyreiniol ochr ddeheuol [[Dyffryn Nantlle]] yw &amp;#039;&amp;#039;&amp;#039;Cwm Tal-y-mignedd&amp;#039;&amp;#039;&amp;#039;. Mae&amp;#039;n gorwedd yng ngheseiliau gogkeddol mynyddoedd [[Clogwyn y Barcud]], [[Y Garn]], [[Mynydd Drws-y-coed]] a [[Trum y Ddysgl|Thrum y Ddysgl]]. Rhed un gangen o [[Afon Gelli-dywyll]] ar hyd-ddi.  &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;Mae yna hen weithfeydd copr a haearn ar ystlys ddwyreiniol y cwm ar lethrau Clogwyn y Barcud.&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 yna hen weithfeydd copr a haearn ar ystlys ddwyreiniol y cwm ar lethrau Clogwyn y Barcud.&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;&amp;lt;ref&amp;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;&amp;lt;/ref&amp;gt;&lt;/ins&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_Tal-y-mignedd&amp;diff=10853&amp;oldid=prev</id>
		<title>Irion am 11:44, 15 Chwefror 2021</title>
		<link rel="alternate" type="text/html" href="https://cof.canolfanuwchgwyrfai.cymru/index.php?title=Cwm_Tal-y-mignedd&amp;diff=10853&amp;oldid=prev"/>
		<updated>2021-02-15T11:44:48Z</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 12:44, 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;Cwm rhewlifol mwyaf dwyreiniol ochr ddeheuol [[Dyffryn Nantlle]] yw &#039;&#039;&#039;Cwm Tal-y-mignedd&#039;&#039;&#039;. Mae&#039;n gorwedd yng ngheseiliau gogkeddol mynyddoedd [[Clogwyn y Barcud]], [[Y Garn]], [[Mynydd Drws-y-coed]] a [[Trum y Ddysgl|&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;Drum &lt;/del&gt;y Ddysgl]]. Rhed un gangen o [[Afon Gelli-dywyll]] ar hyd-ddi.  &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;Cwm rhewlifol mwyaf dwyreiniol ochr ddeheuol [[Dyffryn Nantlle]] yw &#039;&#039;&#039;Cwm Tal-y-mignedd&#039;&#039;&#039;. Mae&#039;n gorwedd yng ngheseiliau gogkeddol mynyddoedd [[Clogwyn y Barcud]], [[Y Garn]], [[Mynydd Drws-y-coed]] a [[Trum y Ddysgl|&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;Thrum &lt;/ins&gt;y Ddysgl]]. Rhed un gangen o [[Afon Gelli-dywyll]] ar hyd-ddi.  &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;Mae yna hen weithfeydd copr a haearn ar ystlys ddwyreiniol y cwm ar lethrau Clogwyn y Barcud.&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 yna hen weithfeydd copr a haearn ar ystlys ddwyreiniol y cwm ar lethrau Clogwyn y Barcud.&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_Tal-y-mignedd&amp;diff=10852&amp;oldid=prev</id>
		<title>Irion am 11:44, 15 Chwefror 2021</title>
		<link rel="alternate" type="text/html" href="https://cof.canolfanuwchgwyrfai.cymru/index.php?title=Cwm_Tal-y-mignedd&amp;diff=10852&amp;oldid=prev"/>
		<updated>2021-02-15T11:44:31Z</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 12:44, 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;Cwm rhewlifol mwyaf dwyreiniol ochr ddeheuol [[Dyffryn Nantlle]] yw &#039;&#039;&#039;Cwm Tal-y-mignedd&#039;&#039;&#039;. Mae&#039;n gorwedd yng ngheseiliau &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;goglkeddol &lt;/del&gt;mynyddoedd[[Clogwyn y Barcud]], [[Y Garn]], [[Mynydd Drws-y-coed]] a [[Trum y Ddysgl|Drum y Ddysgl]]. Rhed un gangen o [[Afon Gelli-dywyll]] ar hyd-ddi.  &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;Cwm rhewlifol mwyaf dwyreiniol ochr ddeheuol [[Dyffryn Nantlle]] yw &#039;&#039;&#039;Cwm Tal-y-mignedd&#039;&#039;&#039;. Mae&#039;n gorwedd yng ngheseiliau &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;gogkeddol &lt;/ins&gt;mynyddoedd [[Clogwyn y Barcud]], [[Y Garn]], [[Mynydd Drws-y-coed]] a [[Trum y Ddysgl|Drum y Ddysgl]]. Rhed un gangen o [[Afon Gelli-dywyll]] ar hyd-ddi.  &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;Mae yna hen weithfeydd copr a haearn ar ystlys ddwyreiniol y cwm ar lethrau Clogwyn y Barcud.&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 yna hen weithfeydd copr a haearn ar ystlys ddwyreiniol y cwm ar lethrau Clogwyn y Barcud.&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_Tal-y-mignedd&amp;diff=10851&amp;oldid=prev</id>
		<title>Irion: Crëwyd tudalen newydd yn dechrau gyda &#039;Cwm rhewlifol mwyaf dwyreiniol ochr ddeheuol Dyffryn Nantlle yw &#039;&#039;&#039;Cwm Tal-y-mignedd&#039;&#039;&#039;. Mae&#039;n gorwedd yng ngheseiliau goglkeddol mynyddoeddClogwyn...&#039;</title>
		<link rel="alternate" type="text/html" href="https://cof.canolfanuwchgwyrfai.cymru/index.php?title=Cwm_Tal-y-mignedd&amp;diff=10851&amp;oldid=prev"/>
		<updated>2021-02-15T11:43:49Z</updated>

		<summary type="html">&lt;p&gt;Crëwyd tudalen newydd yn dechrau gyda &amp;#039;Cwm rhewlifol mwyaf dwyreiniol ochr ddeheuol &lt;a href=&quot;/wici/Dyffryn_Nantlle&quot; title=&quot;Dyffryn Nantlle&quot;&gt;Dyffryn Nantlle&lt;/a&gt; yw &amp;#039;&amp;#039;&amp;#039;Cwm Tal-y-mignedd&amp;#039;&amp;#039;&amp;#039;. Mae&amp;#039;n gorwedd yng ngheseiliau goglkeddol mynyddoeddClogwyn...&amp;#039;&lt;/p&gt;
&lt;p&gt;&lt;b&gt;Tudalen newydd&lt;/b&gt;&lt;/p&gt;&lt;div&gt;Cwm rhewlifol mwyaf dwyreiniol ochr ddeheuol [[Dyffryn Nantlle]] yw &amp;#039;&amp;#039;&amp;#039;Cwm Tal-y-mignedd&amp;#039;&amp;#039;&amp;#039;. Mae&amp;#039;n gorwedd yng ngheseiliau goglkeddol mynyddoedd[[Clogwyn y Barcud]], [[Y Garn]], [[Mynydd Drws-y-coed]] a [[Trum y Ddysgl|Drum y Ddysgl]]. Rhed un gangen o [[Afon Gelli-dywyll]] ar hyd-ddi. &lt;br /&gt;
&lt;br /&gt;
Mae yna hen weithfeydd copr a haearn ar ystlys ddwyreiniol y cwm ar lethrau Clogwyn y Barcud.&lt;br /&gt;
&lt;br /&gt;
 {{eginyn}}&lt;br /&gt;
==Cyfeiriadau==&lt;br /&gt;
{{cyfeiriadau}}&lt;br /&gt;
[[Categori:Daearyddiaeth ffisegol]]&lt;br /&gt;
[[Categori:Mwyngloddio]]&lt;/div&gt;</summary>
		<author><name>Irion</name></author>
	</entry>
</feed>