01 n. pl. The sparingly fossiliferous conglomerates, grits, schists, and slates of Great Britain, which lie at the base of the Cambrian system; -- so…
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1.
The sparingly fossiliferous conglomerates, grits, schists, and slates of Great Britain, which lie at the base of the Cambrian system; -- so called, because typically developed in the Longmynd Hills, Shropshire.(Geol.)