ISBN: 1235886719

[EAN: 9781235886713], Neubuch, [PU: RareBooksClub], EDMUND OTIS HOVEY,WORLD, This item is printed on demand. Paperback. 124 pages. Dimensions: 9.7in. x 7.4in. x 0.3in.This historic book m… Mehr…

[EAN: 9781235886713], Neubuch, [PU: RareBooksClub], EDMUND OTIS HOVEY,WORLD, This item is printed on demand. Paperback. 124 pages. Dimensions: 9.7in. x 7.4in. x 0.3in.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. 1882 Excerpt: . . . rock consists of hornblende and soda-lime feldspar, with very little mica. I could not find quartz in it. It is easily altered, and shows then its interior globular or concretionary structure. The small island south of Virgin Gorda, called Broken Jerusalem, consists entirely of large boulders of hard diorite, left after the softer mass between has been carried away by decomposition, and is a beautiful illustration of the globular structure of the rock. On the small keys south of Drakes Channel, the massive structure graduates into one more or less stratified, so that in some places distinct remains of strata are visible. In other places the main mass sends forth branching veins into the surrounding rocks, proving that it once was in a molten state. The facility with which the rocks disintegrate and decompose, makes it very probable that a mass of the diorite once filled the whole space now occupied by Sir Francis Drakes Channel, but has been carried away by alteration or denudation. 2. Felsite. --This rock, which also could be classed as eurite, or in some spots as quartz-porphyry, forms the southern part of St. Thomas, St. John, and Peters Island. It is visible also on the northern part of Virgin Gorda. The color is generallv light, whitish, reddish, sometimes by alteration blood-red. It is a compact mixture of quartz and feldspar. In some places the quartz is separated in the form of double pyramids. The rock is evidently, in most places, a elastic rock, a kind of tufa; in others, it seems to have been protruded in a molten state as a lava. In the latter case, it has sometimes a fine columnar structure, as at Red Point on St. Thomas. Blue-beach. --This rock, so called by the inhabitants, is a peculiar kind of breccia of fragments of felsitic or trappean . . . This item ships from La Vergne,TN.<

2012, ISBN: 1235886719

[EAN: 9781235886713], Neubuch, [PU: Rarebooksclub.com, United States], Language: English . Brand New Book ***** Print on Demand *****.This historic book may have numerous typos and missin… Mehr…

[EAN: 9781235886713], 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. 1882 Excerpt: .rock consists of hornblende and soda-lime feldspar, with very little mica. I could not find quartz in it. It is easily altered, and shows then its interior globular or concretionary structure. The small island south of Virgin Gorda, called Broken Jerusalem, consists entirely of large boulders of hard diorite, left after the softer mass between has been carried away by decomposition, and is a beautiful illustration of the globular structure of the rock. On the small keys south of Drake s Channel, the massive structure graduates into one more or less stratified, so that in some places distinct remains of strata are visible. In other places the main mass sends forth branching veins into the surrounding rocks, proving that it once was in a molten state. The facility with which the rocks disintegrate and decompose, makes it very probable that a mass of the diorite once filled the whole space now occupied by Sir Francis Drake s Channel, but has been carried away by alteration or denudation. 2. Felsite.--This rock, which also could be classed as eurite, or in some spots as quartz-porphyry, forms the southern part of St. Thomas, St. John, and Peter s Island. It is visible also on the northern part of Virgin Gorda. The color is generallv light, whitish, reddish, sometimes by alteration blood-red. It is a compact mixture of quartz and feldspar. In some places the quartz is separated in the form of double pyramids. The rock is evidently, in most places, a elastic rock, a kind of tufa; in others, it seems to have been protruded in a molten state as a lava. In the latter case, it has sometimes a fine columnar structure, as at Red Point on St. Thomas. Blue-beach.--This rock, so called by the inhabitants, is a peculiar kind of breccia of fragments of felsitic or trappean .<