The Blackened Rocks of the Nile Cataracts and of the Egyptian Deserts PDF ePub eBook

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The Blackened Rocks of the Nile Cataracts and of the Egyptian Deserts free pdf Excerpt from The Blackened Rocks of the Nile Cataracts and of the Egyptian Deserts The writer was led in the first instance to take up the study of this subject by having his attention drawn to some specimens of crystalline rock in the Cairo Geological Museum, which showed a peculiar black polished film on the outer surface. Of the specimens one was a coarse-grained red granite from the First, or Aswan, Cataract of the Nile, and the others were a fine-grained red granite, a basalt and a dolerite respectively, all from the Second Cataract, above Wadi-Halfa. Two visits were subsequently made to Aswan at a time of the year when the river down-stream of the new dam was at its lowest level and when the rocks in the river channel were most exposed. Under these conditions the intense jet-black colour of the rocks forms one of the most noticeable features of the cataract area. The smaller rocks arc entirely black, shine brilliantly, and have the general appearance of masses of coal or blocks of pitch, while the larger rocks show a broad band of polished black immediately above the water level. This remarkable phenomenon has been commented on by many different writers and the following references may be quoted: - "The granite rocks at the Cataract of Aswan have a very thin, dark-black, shining surface-coating, which gives them the appearance of having been pitched." "Les rochers qui sont baignes une partie de I'annee par les eaux du Nil sont quelqucfois revetus a leur exterieur d'une espece d'enduit noir lisse et brillant." 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."

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Details Book

Author : A Lucas
Publisher : Forgotten Books
Data Published : 27 September 2015
ISBN : 1330220765
EAN : 9781330220764
Format Book : PDF, Epub, DOCx, TXT
Number of Pages : 28 pages
Age + : 15 years
Language : English
Rating :

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    . Excerpt from The Blackened Rocks of the Nile Cataracts and of the Egyptian Deserts The writer was led in the first instance to take up the study of this subject by having his attention drawn to some