Harlech Dome: Difference between revisions
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The '''Harlech Dome''' is a [[Dome (geology)|geological dome]] in southern [[Snowdonia]] in north [[Wales]]. It extends approximately from [[Blaenau Ffestiniog]] in the north to [[Tywyn]] in the south, and includes [[Harlech]], [[Rhinogydd|The Rhinogydd]],<ref name=sno>{{cite web| |
The '''Harlech Dome''' is a [[Dome (geology)|geological dome]] in southern [[Snowdonia]] in north [[Wales]]. It extends approximately from [[Blaenau Ffestiniog]] in the north to [[Tywyn]] in the south, and includes [[Harlech]], [[Rhinogydd|The Rhinogydd]],<ref name=sno>{{cite web|url=http://www.thesnowdonian.com/regions/rhinogydd|title=Rhinogydd|work=The Snowdonial|accessdate=16 November 2014|deadurl=yes|archiveurl=https://web.archive.org/web/20141129014708/http://www.thesnowdonian.com/regions/rhinogydd|archivedate=29 November 2014|df=}}</ref> [[Barmouth]] and [[Cadair Idris]].<ref name=bgs/> |
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The geological layer structure comprises [[Cambrian]] [[sedimentary rock|sedimentary]], [[Volcanic rock|volcanic]] and [[Intrusion|intrusive]] rocks from the lower [[Paleozoic]] age<ref name=bgs/> approximately 4.5km thick.<ref name=ccw>{{cite web|url=http://www.ccgc.gov.uk/landscape--wildlife/geological-gems/wales-journey-through-time/cambrian/cambrian-rocks-in-wales.aspx|title=Cambrian rocks in Wales|work=Countryside Council for Wales|accessdate=14 November 2014}}</ref> |
The geological layer structure comprises [[Cambrian]] [[sedimentary rock|sedimentary]], [[Volcanic rock|volcanic]] and [[Intrusion|intrusive]] rocks from the lower [[Paleozoic]] age<ref name=bgs/> approximately 4.5km thick.<ref name=ccw>{{cite web|url=http://www.ccgc.gov.uk/landscape--wildlife/geological-gems/wales-journey-through-time/cambrian/cambrian-rocks-in-wales.aspx|title=Cambrian rocks in Wales|work=Countryside Council for Wales|accessdate=14 November 2014|deadurl=yes|archiveurl=https://web.archive.org/web/20141128192532/http://www.ccgc.gov.uk/landscape--wildlife/geological-gems/wales-journey-through-time/cambrian/cambrian-rocks-in-wales.aspx|archivedate=28 November 2014|df=}}</ref> |
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The geology contains the [[Harlech Grits Group]], [[Mawddach Group]], [[Rhobell Fawr|Rhobell Volcanic Group]] and [[Aran Volcanic Group]].<ref name=bgs/> |
The geology contains the [[Harlech Grits Group]], [[Mawddach Group]], [[Rhobell Fawr|Rhobell Volcanic Group]] and [[Aran Volcanic Group]].<ref name=bgs/> |
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Revision as of 07:22, 30 October 2017
The Harlech Dome is a geological dome in southern Snowdonia in north Wales. It extends approximately from Blaenau Ffestiniog in the north to Tywyn in the south, and includes Harlech, The Rhinogydd,[1] Barmouth and Cadair Idris.[2]
The geological layer structure comprises Cambrian sedimentary, volcanic and intrusive rocks from the lower Paleozoic age[2] approximately 4.5km thick.[3] The geology contains the Harlech Grits Group, Mawddach Group, Rhobell Volcanic Group and Aran Volcanic Group.[2]
The area contains a wide range of metallic minerals and has been mined for (copper,[4] silver,[4] zinc,[4] manganese,[5] gold[4][6][7]) in the past.[2]
References
- ^ "Rhinogydd". The Snowdonial. Archived from the original on 29 November 2014. Retrieved 16 November 2014.
{{cite web}}: Unknown parameter|deadurl=ignored (|url-status=suggested) (help) - ^ a b c d "Mineral Reconnaissance Programme Report No 74 - "A reconnaissance geochemical drainage survey of the Harlech Dome, North Wales" (1985 PDF - mineralogical report, 113pp)]". British Geological Survey, Natural Environment Research Council. Retrieved 14 November 2014.
- ^ "Cambrian rocks in Wales". Countryside Council for Wales. Archived from the original on 28 November 2014. Retrieved 14 November 2014.
{{cite web}}: Unknown parameter|deadurl=ignored (|url-status=suggested) (help) - ^ a b c d "Mineral exploration in the Harlech Dome, North Wales". NERC Open Resesarch Archive. Retrieved 16 November 2014.
- ^ "Geology - Harlech Dome". Merioneth Manganese. Retrieved 16 November 2014.
- ^ "The Geology of the Barmouth and Arthog area". Bernard O’Connor. Retrieved 16 November 2014.
- ^ "Chasing ancient microcontinents in North Wales - the Megumia project". Geology Wales. Retrieved 16 November 2014.
52°52′N 3°55′W / 52.86°N 3.91°W
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