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THE JURASSIC SYSTEM
THE PLEISTOCENE AND RECENT FORMATIONS
THE GEOLOGICAL HISTORY OF THE DOMESTIC ANIMALS
abundant acid agricultural animals appears becomes beds British calcareous called carbonate Carboniferous Chalk character chemical clay climate coast colour common commonly composition considerable consists contain covered deposits derived described developed district division drift east effect England especially example existence extent fact fault feet fertile follows formation fossils geological give glacial gravels ground hard heavy Hence Hills igneous important includes iron Isles kind known Lake land layer less lime limestones Lower mainly maps masses material matter Middle minerals mountain nature occur origin outcrop owing peat plants Pleistocene present probably rainfall regions result rich rise river rocks salt sand sandstones Scotland sediments seen silica similar soils solution sometimes strata surface term thickness Upper usually valley varieties various varying weathering whole yield Yorkshire