File:Report on the scientific results of the voyage of H.M.S. Challenger during the years 1873-76 - under the command of Captain George S. Nares, R.N., F.R.S. and Captain Frank Turle Thomson, R.N. (1889) (14595639737).jpg

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Identifier: reportonscientif02grea (find matches)
Title: Report on the scientific results of the voyage of H.M.S. Challenger during the years 1873-76 : under the command of Captain George S. Nares, R.N., F.R.S. and Captain Frank Turle Thomson, R.N.
Year: 1889 (1880s)
Authors: Great Britain. Challenger Office Challenger (Ship) Thomson, C. Wyville (Charles Wyville), Sir, 1830-1882 Murray, John, Sir, 1841-1914 Nares, George S. (George Strong), 1831-1915 Thomson, Frank Tourle
Subjects: Challenger Expedition, 1872-1876 Scientific expeditions
Publisher: Edinburgh : Neill
Contributing Library: MBLWHOI Library
Digitizing Sponsor: MBLWHOI Library

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often twolarge individuals cross each other. The sections of this mineral are cracked andpervaded with zeolitic matter, which forms an irregular network. This matter, which 180 THE VOYAGE OF H.M.S. CHALLENGER. looks slightly grey when seen by ordinary light, remains obscured between crossednicols. The augite is seen in roughly formed grains embedded between the felspathicsections. The olivine, of which large sections are seen, is uniformly changed into redhematite ; these sections, however, still show extinctions like those of unaltered olivine.In this rock, as in all the other rocks of Juan Fernandez, magnetite is often observedin elongated sections. In addition to the products of decomposition of plagioclase andolivine, small patches of olivine are to be seen. Some other specimens collected onthe shore differ neither in structure nor in mineralogical composition from those justdescribed. It is consequently to be inferred that Juan Fernandez is principallycomposed of basaltic rocks.
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Great Britain. Challenger Office; Challenger (Ship); Thomson, C. Wyville (Charles Wyville), Sir, 1830-1882; Murray, John, Sir, 1841-1914; Nares, George S. (George Strong), 1831-1915;

Thomson, Frank Tourle
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Physics and Chemistry v. 02
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30 July 2014


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30 August 2015

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current10:01, 29 October 2015Thumbnail for version as of 10:01, 29 October 20152,960 × 2,282 (483 KB)SteinsplitterBot (talk | contribs)Bot: Image rotated by 90°
15:34, 29 August 2015Thumbnail for version as of 15:34, 29 August 20152,282 × 2,966 (484 KB) (talk | contribs)== {{int:filedesc}} == {{information |description={{en|1=<br> '''Identifier''': reportonscientif02grea ([https://commons.wikimedia.org/w/index.php?title=Special%3ASearch&profile=default&fulltext=Search&search=insource%3A%2Freportonscientif02grea%2F fin...