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Geology of the Counties of England and of North and South Wales
William Jerome Harrison
Keine Leseprobe verfügbar - 2017
Ammonites band beds Boulder Clay called Carboniferous chalk cliffs coal coal-field Coal-measures coal-seams coast containing coprolites corals Crag denudation deposits Devonian district east eastwards England Eocene escarpment exposed fault feet in thickness feet thick flint Forest formation fossils Gault Geol Geological Survey geologists glacial granite gravel Greensand hard Hill igneous iron Journ Keuper Kimmeridge Kimmeridge Clay land layers Lias lime Lincolnshire London Clay Lower maps marls mass Messrs miles Millstone Grit Mountain Limestone Museum Natural History nodules north-east north-west Northampton Sand numerous occur Old Red Old Red Sandstone Oolite outcrop Oxford Clay pebbles Permian Prof Professor quarried Reading Beds red marl Red Sandstone river round running sand sandy seams seen shales shells Silurian Silurian rocks slates Society south-east south-west southwards species stone strata surface Tertiary thin tons total thickness traced Triassic Upper valley Wales Whitaker Yorkshire