Mynydd Ceiswyn is a mountain in
Wales
Wales ( ) is a Countries of the United Kingdom, country that is part of the United Kingdom. It is bordered by the Irish Sea to the north and west, England to the England–Wales border, east, the Bristol Channel to the south, and the Celtic ...
. It is the peak south of
Waun-oer in the
Dyfi Hills. On the east side of the mountain is the valley of the
Nant Ceiswyn
The Nant Ceiswyn (sometimes known as the ''Afon Ceiswyn'') is a small river in Mid Wales. It flows from the northern flank of Mynydd Dolgoed down to Pont Cymerau, north-east of Aberllefenni. Here it joins the Nant Llwydiarth to form the Afon Dula ...
, and
Cwm Hengae
Cwm Hengae is a valley that runs roughly north-west from the village of Aberllefenni in Wales. The Afon Llefenni river runs along the valley and several slate quarries occupy the valley sides. The Roman road Sarn Helen ran along the valley, c ...
lies to the south.
Two minor
dip faults cross the mountain,
and the
Ceiswyn Formation
The Ceiswyn Formation (also known as the Ceiswyn Beds) is an Ordovician lithostratigraphic group (a sequence of rock strata) in Mid Wales. The rock of the formation is made up of interleaved beds of silty mudstones and siltstones with some sands ...
is named after this mountain.
References
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Aberllefenni
Mountains and hills of Gwynedd
Mountains and hills of Snowdonia
Dyfi Hills