Allan, Thomas. - OBSERVATIONS ON THE FORMATION OF THE CHALK STRATA, and on the Structure of the Belemnité. (Read 2n April 1821).

..., 1821. Slim 4to. ([393]-418)pp. 2 engraved plates (plate nos. 25 & 26) by Lizars showing 11 examples of flints containing belemnites. Unopened in parts, disbound, loosely inserted in modern paper wrapps. with paper title label and booksellers ink stamp to upper wrapp. ¶ From the Proceedings of the Royal Society of Edinburgh, Volume IX. Thomas Allen (1777-1833) mineralogist and collector of minerals. His paper includes consideration of the current theories about the formation of flint given by various authorities from Daubuisson to Hutton, Parkinson to Werner and then adds his own thoughts on the subject.

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