ISBN: 1231119470

[EAN: 9781231119471], Neubuch, [PU: RareBooksClub], GEOLOGICAL SURVEY,SUBJECTS, This item is printed on demand. Paperback. 92 pages. Dimensions: 9.7in. x 7.4in. x 0.2in.This historic book… More...

[EAN: 9781231119471], Neubuch, [PU: RareBooksClub], GEOLOGICAL SURVEY,SUBJECTS, This item is printed on demand. Paperback. 92 pages. Dimensions: 9.7in. x 7.4in. x 0.2in.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. 1903 Excerpt: . . . the rocks of the Walker River Range are igneous. Those on the steep eastern face are generally granular, and those on the west side typical volcanics. GRANULAR ROCKS. Just west of the Indian agency at the upper end of Walker Lake, the rock of the mountains is chiefly a coarse-grained biotite-granite. Farther north, near the point where the road crosses the range, biotite-granite-aplite, of a distinctly more siliceous variety than the first, occurs in conjunction with great masses of alaskite-aplite. On the road which crosses the range, at a point southwest of Hawthorne, the summit and greater part of the mountain range appears to be also of decomposed biotite-granite. Between these two localities the granite is probably nearly or quite continuous. Underlying the biotite-granite, at the point first described, is a dark rock, specimens of which proved to be hornblende-quartz-syenite and biotite-hornblende-quartz-monzonite. The granite is shown by its branching dikes to be intrusive into the more basic rock. Both rocks are cut by dikes of alaskite, which grows very siliceous and runs out in places to nearly pure quartz. In the cream-colored mountain of granite and alaskite around which the road turns in crossing the range, the alaskite is evidently younger than the siliceous granite, into which, however, it passes by transitional stages as regards its composition. The granite sometimes contains large feldspar phenocrysts, similar to those of the rock near Belmont and near Ellsworth. At the pass southwest from Hawthorne, the biotite-granite which occupies the summit of the mountains is succeeded farther east by metamorphosed igneous rocks, probably altered by dynamic movements. These rocks lie along the face of a bold, eastward-facing scarp. As examined microsc. . . This item ships from La Vergne,TN.<

2012, ISBN: 1231119470

[EAN: 9781231119471], Neubuch, [PU: Rarebooksclub.com, United States], Language: English Brand New Book ***** Print on Demand *****. This historic book may have numerous typos and missing… More...

[EAN: 9781231119471], Neubuch, [PU: Rarebooksclub.com, United States], Language: English Brand New Book ***** Print on Demand *****. 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. 1903 Excerpt: .the rocks of the Walker River Range are igneous. Those on the steep eastern face are generally granular, and those on the west side typical volcanics. GRANULAR ROCKS. Just west of the Indian agency at the upper end of Walker Lake, the rock of the mountains is chiefly a coarse-grained biotite-granite. Farther north, near the point where the road crosses the range, biotite-granite-aplite, of a distinctly more siliceous variety than the first, occurs in conjunction with great masses of alaskite-aplite. On the road which crosses the range, at a point southwest of Hawthorne, the summit and greater part of the mountain range appears to be also of decomposed biotite-granite. Between these two localities the granite is probably nearly or quite continuous. Underlying the biotite-granite, at the point first described, is a dark rock, specimens of which proved to be hornblende-quartz-syenite and biotite-hornblende-quartz-monzonite. The granite is shown by its branching dikes to be intrusive into the more basic rock. Both rocks are cut by dikes of alaskite, which grows very siliceous and runs out in places to nearly pure quartz. In the cream-colored mountain of granite and alaskite around which the road turns in crossing the range, the alaskite is evidently younger than the siliceous granite, into which, however, it passes by transitional stages as regards its composition. The granite sometimes contains large feldspar phenocrysts, similar to those of the rock near Belmont and near Ellsworth. At the pass southwest from Hawthorne, the biotite-granite which occupies the summit of the mountains is succeeded farther east by metamorphosed igneous rocks, probably altered by dynamic movements. These rocks lie along the face of a bold, eastward-facing scarp. As examined microsc.<

ISBN: 9781231119471

Geological Survey, Paperback, English-language edition, Pub by General Books LLC Books Bulletin~~Washington-Geological-Survey General Books LLC