The Culm Measures are a thick sequence of geological strata originating during the Carboniferous Period that occur in south-west England, principally in Devon and Cornwall, now known as the Culm Supergroup. Its estimated thickness varies between 3600 m and 4750 m though intense folding complicates it at outcrop.
The Culm Measures are a substantial layer of geological formations that formed during the Carboniferous Period in southwest England, specifically Devon and Cornwall. They make up the Culm Supergroup. Their thickness varies between 3600 meters and 4750 meters, but is difficult to measure accurately due to folding at outcrop sites.