Aldrich, Thomas Bailey, 1836-1907 · Boston, CT : Hall and Locke · leaf 86
tone, Muschel ^g\7Kalk (shell-limestone), and Keuper l^M;(clay), most frequently combinedin its formations; the Jurassic, soamply illustrated in the chain ofthe Jura, where geologists first found the clew to its history; and Crustacea.—Devonian the Cretaceous period, to which thechalk chffs of…
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