Culm Measures

Chevron folding in the cliffs at Millook Haven, North Cornwall

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 3600m and 4750m though intense folding complicates it at outcrop. They are so called because of the occasional presence in the Barnstaple-Hartland area of a soft, often lenticular, sooty coal, which is known in Devon as culm. The word culm may be derived from the Old English word for coal col or from the Welsh word cwlwm meaning knot (due to the folding of the beds in which the coal is found).

单词	Culm Measures
释义	Culm Measures 英语百科 Culm Measures 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 3600m and 4750m though intense folding complicates it at outcrop. They are so called because of the occasional presence in the Barnstaple-Hartland area of a soft, often lenticular, sooty coal, which is known in Devon as culm. The word culm may be derived from the Old English word for coal col or from the Welsh word cwlwm meaning knot (due to the folding of the beds in which the coal is found).
随便看	celebensis的意思 celeberrimous的意思 Celebes的意思 Celebes Ape的意思 Celebes Apes的意思 Celebes Basin的意思 Celebes Black Ape的意思 celebes buffalo的意思 Celebes crested macaque的意思 Celebesian的意思 Celebes的意思 Celebes Sea的意思 Celebes subregion的意思 Celebes vibrio的意思 Celebi的意思 Celebibagi的意思 celebica的意思 celebicum的意思 celebicus的意思 celebis的意思 celeblog的意思 Celebra的意思 celebrable的意思 celebrant的意思 celebrant的意思