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" The most striking feature in the texture of the unaltered gabbro is the repeated and abrupt change in the coarseness of the grain which is seen at some localities. It was undoubtedly caused by some irregularity in the cooling of the original magma from... "
The Educational Series of Rock Specimens, Collected and Distributed by the ... - Σελίδα 278
των Joseph Silas Diller - 1898 - 400 σελίδες
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Scientific Papers

George Huntington Williams - 1884 - 900 σελίδες
...darker colored spots, of the pyroxene of the gabbro by the primary brown hornblende above described. The color of the hypersthene-gabbro is on the whole...although it may vary from a purplish black to gray. The latter varieties show an almost entire absence of the inclusions from the pyroxene constituents and...

Report of Work Done in the Division of Chemistry and Physics ..., Τόμος 1

Frank Wigglesworth Clarke - 1886 - 226 σελίδες
...darker colored spots, of the pyroxene of the gabbro by the primary brown hornblende above described. The color of the hypersthene-gabbro is on the whole...although it may vary from a purplish- black to gray. The latter varieties show an almost entire absence of the inclusions from the pyroxene constituents and...

Neues Jahrbuch für Mineralogie, Geologie und Paläontologie: Beilage ..., Τόμος 8

1893 - 846 σελίδες
...Gabbros and Associated Hornblende Rocks occurring in the Neighborhood of Baltimore, Md."1 auf S. 25: „The most striking feature in the texture of the...repeated and abrupt change in the coarseness of the gram which is seen at some localities. It was undoubtely caused by some irregularity in the cooling...

Annual Report, Τόμος 8

Geological Survey of Canada - 1897 - 1106 σελίδες
...and Associated Hornblende Rocks occurring in the neighbourhood of Baltimore, Md., says on page 25 : " The most striking feature in the texture of the unaltered...coarseness of the grain which is seen at some localities. It was undoubtedly caused \>y some irregularity in the cooling of the original magma from a molten...

Annual Report, Τόμος 8

Geological Survey of Canada - 1897 - 1088 σελίδες
...Asso« ciated Hornblende Rocks occurring in the neighbourhood of Baltimore, Md., says on page 25 : " The most striking feature in the texture of the unaltered...coarseness of the grain which is seen at some localities. It was undoubtedly caused by some irregularity in the cooling of the original magma from a molten state,...

Annual Report (new Series).: Volume 1-XVI ... 1885-1904, Τόμος 8

Geological Survey of Canada - 1897 - 1098 σελίδες
...and Associated Hornblende Rocks occurring in the neighbourhood of Baltimore, Md., says on page 25 : " The most striking feature in the texture of the unaltered...coarseness of the grain which is seen at some localities. It was undoubtedly caused by some irregularity in the cooling of the original magma from a molten state,...

The Canadian Record of Science, Τόμος 7

1897 - 698 σελίδες
...and iron ore. On the same structure in rocks around Baltimore Dr. EH Williams remarks as follows: — "The most striking feature in the texture of the unaltered...coarseness of the grain which is seen at some localities. It was undoubtedly caused by gome irregularities in the cooling of the original magma, for which it...

Papers from the Department of Geology, Τεύχος 3;Τεύχος 5;Τεύχος 8

McGill University Department of Geology - 1897 - 260 σελίδες
...and Associated Hornblende Rocks occurring in the neighbourhood of Baltimore, Md., says on page 25 : " The most striking feature in the texture of the unaltered...coarseness of the grain which is seen at some localities. It was undoubtedly caused by some irregularity in the cooling of the original magma from a molten state,...

Bulletin of the United States Geological Survey

Geological Survey (U.S.) - 1898 - 964 σελίδες
...associated hornblcndic rocks. Its irregular polygonal blocks are often covered with a thin coating of u deep red color duo to decomposition, beneath which,...change in the coarseness of the grain which is seen at ноте localities. This phenomenon, as is well known, is one frequently observed in very ancient...

Neues Jahrbuch für Mineralogie, Geologie und Paläontologie. Beilage ..., Τόμος 8

1893 - 820 σελίδες
...Gabbros and Associated Hornblende Rocks occurring in the Neighborhood of Baltimore, Md."1 auf S. 25: „The most striking feature in the texture of the...coarseness of the grain which is seen at some localities. It was undoubtely caused by some irregularity in the cooling of the original magma from a molten state,...




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