
In geology, Cornbrash was the name applied to the uppermost member of the Bathonian stage of the Jurassic formation in England. It is an old English agricultural name applied in Wiltshire to a variety of loose rubble or brash which, in that part of the country, forms a good soil for growing corn. The name was adopted by William Smith for a thin ba...
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http://en.wikipedia.org/wiki/Cornbrash

Cornbrash is a local name in England for a rubbly limestone, forming a soil extensively cultivated in Wiltshire for the growth of corn. The term is used by geologists to indicate the strata which yield the soil, the highest member of the lower Oolite.
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http://www.probertencyclopaedia.com/browse/HC.HTM
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