The Tertiary Igneous Rocks Of Skye

Author : Alfred Harker
Publisher :
ISBN 13 : 9781332330850
Total Pages : 552 pages
Book Rating : 4.3/5 (38 download)

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Download or read book The Tertiary Igneous Rocks of Skye (Classic Reprint) written by Alfred Harker and published by . This book was released on 2015-08-05 with total page 552 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from The Tertiary Igneous Rocks of Skye The Tertiary Volcanic region of the West of Scotland is well known to be of exceptional interest from many points of view, and on this account my predecessor, Sir A. Geikie, determined that a typical portion of the region should be mapped and described in great detail. The district comprising the central mountain group of Skye was selected by him, and the services of Mr. Harker were secured in order that the actual survey and the petrographical work might be carried out by the same officer. The present memoir is, therefore, the result of work which was planned and in great part executed under the direction of Sir A. Geikie, who has himself contributed very largely to our knowledge of the selected area, and who has taken from first to last special interest in Mr. Barkers researches. The district is one which has attracted the attention of many distinguished geologists from the days of Macculloch down to recent years. The main outlines of the geology are, therefore, miliar to students of the science, but in view of the publication of this volume some of the salient features of the development of research may here be referred to. MaccuUoch sclassic work showed that the basalts of the plateaux and the eruptive masses pierce and overlie the Oolitic strata, and are therefore younger than the Jurassic rocks. The discovery of plant remains at Ardtun, in Mull, announced by the Duke of Argyll in 1851, marked an important advance, for they were regarded by Professor E.Forbes as proving the Tertiary age of the basalts with which they are associated. At the same time Forbes was led to the conclusion, from the evidence at Loch Staffin, in Skye, that the basaltic lavas are there contemporaneous with the Oolitic strata. Following the opinion of Professor Forbes, in his earliest investigations Sir A. Geikie inferred that the basaltic lavas of Skye are not younger than some late part of the Jurassic period, and he further contended that the gabbros of that island are of Archaean age from the striking resemblance of the banded types to some of the ancient gneisses of the North-West Highlands. In 1871 appeared Zirkel svaluable description of the petrology of the igneous rocks of Skye. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.