Garnedd-Wen Formation facts for kids
Quick facts for kids Garnedd-Wen FormationStratigraphic range: Hirnantian Age |
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The upper slopes of Tarren y Gesail are primarily in the Garnedd-Wen Formation
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| Type | Group |
| Unit of | Abercorris Group |
| Overlies | Narrow Vein Mudstone Formation |
| Thickness | 1,000 metres (3,300 ft) to 3,000 metres (9,800 ft) |
| Lithology | |
| Primary | Mudstone |
| Other | Sandstone |
| Location | |
| Coordinates | 52°38′07″N 3°54′26″W / 52.6354°N 3.9071°W |
| Region | Mid Wales |
| Country | Wales |
| Extent | Tywyn to Dinas Mawddwy |
| Type section | |
| Named for | Garneddwen |
The Garnedd-Wen Formation (also known as the Garnedd-Wen Beds) is an Ordovician lithostratigraphic group (a sequence of rock strata) in Mid Wales. The rock of the formation is a mixture of mudstones, siltstones, fine- to coarse-grained sandstones, greywackes and conglomerates. The formation extends from Dinas Mawddwy in the north-east to Tywyn in the south-west.
Geography
The Garnedd-Wen Formation is the upper strata of rock across a wide part of western Mid Wales. In particular, it forms the upper rock beds of the Tarren Hills on the south side of the Bala Fault, west of Talyllyn Lake.
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Garnedd-Wen Formation Facts for Kids. Kiddle Encyclopedia.