[Geology] XI. An Account of Observations, made by Lord Webb Seymour and Professor Playfair, upon some Geological Appearances in Glen Tilt, and the adjacent Country [Transactions of the Royal Society of Edinburgh]

Edinburgh and London: Printed for Archibald Constable and Co. and Cadell and Davies, 1815. Wrappers. Fine. Original article disbound from Volume VII of Transactions of The Royal Society of Edinburgh (not a reprint, facsimile reproduction, or photocopy). Roman numerals preceding title refer to order of sequence as published in the Transactions. Demy 4to (273 x 210mm): 303-375pp, complete with five folding plates and folding map showing Glen Tilt. Recently bound by Fitterer in stiff marbled wrappers. An excellent wide-margined example, tightly bound and clean throughout. The river Tilt is a principal branch of the Tay, which rises on the borders of Aberdeenshire and runs towards the southwest, through the northeastern part of the county of Perth. A portion of the valley along its course, for about ten miles above Blair of Atholl, is called Glen Tilt, which Seymour and Playfair visited to study the geology of the rugged, mountainous terrain. In 1785, Hutton had examined outcrops in Glen Tilt, noting "contact relationships between Precambrian metasedimentary rocks and Paleozoic granite bodies, although he had no knowledge of their true ages." These breccias "were very influential, because they sparked a long, and at times acrimonious, debate about the origins of igneous rocks and especially granite." (Kerr, "Long Walks, Lost Documents and the Birthplace of Igneous Petrology: Exploring Glen Tilt, Perthshire, Scotland," July 2020, Geoscience Canada) N. B. With few exceptions (always identified), we only stock books in exceptional condition, carefully preserved in archival, removable mylar sleeves. All orders are packaged with care and posted promptly. Satisfaction guaranteed. (Fine Editions Ltd is a member of the Independent Online Booksellers Association, and we subscribe to its codes of ethics.).