Quartz Conglomerate
Late Devonian (Fammenian)
PERIOD |
GROUP |
FORMATION |
Devonian |
Old Red Sandstone |
Quartz Conglomerate |
Lithology
Comprises between one to several thick conglomerate beds, interbedded with sandstone. Pebbles are largely vein quartz, with some quartzite, jasper and decomposed igneous rocks.
Upper Boundary
Comformable passage into more sandstone dominated sequence of the Tintern Sandstone.
Lower Boundary
Unconformable, resting on the interbedded sandstones, siltstones and mudstones of the Early Devonian Brownstones.
Representative Sites
Lea Bailey Track Cutting
Soudley Valley Railway Cutting
Information on lithology and boundaries taken from the British Geological Survey Lexicon of Named Rock Units
and BGS Memoirs.
|
