Report of Explorations across the Great Basin in 1859 - Softcover

Simpson, James H.

Softcover

ISBN 10: 0874170788 ISBN 13: 9780874170788

Publisher: University of Nevada Press, 1983

Synopsis

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1876 edition. Excerpt: ...and partly of a coarse, uneven grain. Inside most of the pieces are much lighter colored and less cemented, even friable. Then follow--80 feet of slope, with occasional outcrops of shale and sandstone, some of which is very compact and finely grained. 40 feet of white, purely quartzose sandstone, with an even and rather fine grain, and easily crumbling. It generally does not show any distinct stratification. The lowest 30 feet are gray and white argillaceous shales, not all well exposed. There, also, I did not find any organic remains, except indistinct impressions of wood, in the ferruginous sandstone, on top of the hill. I have, however, little doubt that, if not the whole section, then, at least, this upper bed, is Lower Cretaceous, the No. I of the Nebraska section; and the whole may correspond to the Arenaceous group and Marly Clay group of Dr. Shumard. West of Rock Creek the exposures are scarce, the rocks being too friable, and easily disintegrating. Only on the hills, toward Little Sandy Creek, I noticed strata similar to those on Rock Creek--white quartzose sandstone, overlaid by gray and white argillaceous shales, with arenaceous and ferruginous portions and seams--and higher up large flags of dark-brown ferruginous sandstone. A little farther on, the hills which overlook Little Sandy Creek are capped by white limestone, nearly made up of Inoceramus (Inoceramus pseudomytiloides and /. aviculoides), and in which also a Baculites was found. They correspond to No. Ill of the Nebraska Cretaceous section of Messrs. Meek and Hay den, which is so largely developed on the Upper Missouri. Underneath this rock follows a series of argillaceous shales about 40 feet thick, which seems to be an equivalent of No. II of the Nebraska section; and on the...

Edition details

• Publisher: University of Nevada Press
• Publication date: 1983
• Language: English
• ISBN 10: 0874170788
• ISBN 13: 9780874170788
• Binding: Paperback
• Number of pages: 518