The Afon Deri (sometimes known as the ''Afon Corris''
) is a
river
A river is a natural flowing watercourse, usually freshwater, flowing towards an ocean, sea, lake or another river. In some cases, a river flows into the ground and becomes dry at the end of its course without reaching another body of wate ...
in
Mid Wales
Mid Wales ( cy, Canolbarth Cymru or simply ''Y Canolbarth'', meaning "the midlands") or Central Wales refers to a region of Wales, encompassing its midlands, in-between North Wales and South Wales. The Mid Wales Regional Committee of the Senedd ...
. It flows from the eastern flank of
Mynydd Ty-Glas down to
Corris
Corris is a village in the county of Gwynedd, Wales, about north of the town of Machynlleth. The village lies on the west bank of the Afon Dulas (which here forms the boundary with Powys), around that river's confluence with the Afon Deri. Its ...
, where it joins the
Afon Dulas
The Afon Dulas, or North Dulas, is a river forming the border between Merionethshire/Gwynedd and Montgomeryshire/Powys in Wales. Another river called Afon Dulas joins the Dyfi from the south, upstream of its confluence with the North Dulas: loca ...
that flows south to the
Afon Dyfi.
The river passes through the village of
Corris Uchaf
Corris Uchaf ( en, Upper Corris) is a village lying in the south of the Snowdonia National Park in Gwynedd, Wales.
The slate quarries that surround Corris Uchaf are its most prominent feature.
Description
The village lies in the valley o ...
and its lower reaches pass through the richest area of
slate quarrying
Slate is a fine-grained, foliated, homogeneous metamorphic rock derived from an original shale-type sedimentary rock composed of clay or volcanic ash through low-grade regional metamorphism. It is the finest grained foliated metamorphic rock. ...
in Mid Wales. The
Braichgoch,
Abercorris and
Abercwmeiddaw quarries are to be found beside the Afon Deri.
References
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Rivers of Gwynedd
Rivers of Snowdonia