Contributions From The Geological Department Of Columbia University Volume 28 PDF Download
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Author | : Columbia University. Geology |
Publisher | : Rarebooksclub.com |
Total Pages | : 126 |
Release | : 2013-09 |
Genre | : |
ISBN | : 9781230076416 |
Download Contributions from the Geological Department of Columbia University Volume 28 Book in PDF, ePub and Kindle
This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1920 edition. Excerpt: ... decreased solubility as determined by the slope of the solubilitysaturation curve, line AL in Figure 4. The fact that the "secondary" blebs of potash feldspar in the original member, rich in soda, are not seen, even under high magnifications (950 diameters). testifies to the nearly vertical character of the corresponding curve, BM in Figure 4. Extinction angles, crushed fragments: Popular: Microcline microperthite Technical: Microcline hypoperthite. "Orthoclase," near Unionville, Chester County, Pennsylvania. (Specimen 996.) Microscopic examination, thin section: Typical microcline microperthite with inclusions of diopside, quartz, and untwinned feldspar thought to be anorthoclase. A. Microcline microperthite (hypoperthitc), calle(l"Amazonstone," Mineral Hill, Pennsylvania. Polarized light. X30. Specimen 964. B. Microcline microperthite (hypoperthite), called "Amazonstone," near Florissant, California. Polarized light. X30. Specimen 971. Extinction angles, crushed fragments: Potash phase........ (010)........... 7.o (001)........... 17.0 Soda phase.......... (010)........... 13.0 (001)........... 1.o Inferred Composition Potash Phase Soda Phase K-feldspar........... 79.0 2.0 Na-feldspar.......... 19.0 89.0. Ca-feldspar.......... 2.0 9.0 QUANTITATIVE MICROSCOPIC ANALYSIS Phase Percentage K-feldspar Na-feldspar Ca-feldspar Silim Sodamicrocline.... 71.5 79.0 19 2.0 0. Oligoclase......... 24. 1 2.0 89 9.0 0. Quartz.................................................. 100 Sodamicrocline............... 56.5 13 1.4........ Oligoclase.....................5 21 2. 2........ Quartz......................................._........... 4.4 Total.................... 57.0 35.0 3.6 4.4 Classification: 13....
Author | : Columbia University. Dept. of Geology |
Publisher | : |
Total Pages | : 952 |
Release | : 1919 |
Genre | : |
ISBN | : |
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Author | : |
Publisher | : |
Total Pages | : 642 |
Release | : 1947 |
Genre | : Geology |
ISBN | : |
Download Bulletin Book in PDF, ePub and Kindle
Author | : Columbia University. Libraries |
Publisher | : |
Total Pages | : 1174 |
Release | : 1923 |
Genre | : |
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Download University Bibliography Book in PDF, ePub and Kindle
Author | : Geological Survey (U.S.) |
Publisher | : |
Total Pages | : 232 |
Release | : 1905 |
Genre | : Geology |
ISBN | : |
Download Bulletin of the United States Geological Survey Book in PDF, ePub and Kindle
Author | : Fred Boughton Weeks |
Publisher | : |
Total Pages | : 222 |
Release | : 1905 |
Genre | : Geology |
ISBN | : |
Download Bibliography and Index of North American Geology, Paleontology, Petrology and Mineralogy for the Year 1904 Book in PDF, ePub and Kindle
Author | : |
Publisher | : |
Total Pages | : 1030 |
Release | : 1965 |
Genre | : Geology |
ISBN | : |
Download Geological Survey Bulletin Book in PDF, ePub and Kindle
Author | : William Herbert Hobbs |
Publisher | : |
Total Pages | : 492 |
Release | : 1905 |
Genre | : Geology |
ISBN | : |
Download The Configuration of the Rock Floor of Greater New York Book in PDF, ePub and Kindle
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Total Pages | : 514 |
Release | : 1911 |
Genre | : Biology |
ISBN | : |
Download Biology Pamphlets Book in PDF, ePub and Kindle
Author | : William N. Orr |
Publisher | : Waveland Press |
Total Pages | : 247 |
Release | : 2018-12-20 |
Genre | : Science |
ISBN | : 1478638834 |
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The geologic history of the Pacific Northwest is as unique as the region itself. Completely reorganized and revised, the Third Edition of Geology of the Pacific Northwest brings the area’s volcanism, earthquakes, tsunamis, and geologic environmental issues into sharp focus. William and Elizabeth Orr provide a singular perspective and explore the Pacific Northwest writ large, including Southeast Alaska, British Columbia, Washington, Oregon, Idaho, and northern California. Descriptive and detailed photographs of the formations and terranes of each subregion are included, along with color plates that illuminate and expose the fundamental processes that shaped Pacific Northwest geology. The text reveals the geological origins, geographic features, phenomena, and natural resources of areas throughout the region. As urban development continues to expand in the tectonically active Pacific Northwest, environmental concerns and geologic hazards will grow more and more important. The authors’ central theme that continental plate tectonics are the fundamental processes of Northwest geologic history leads to deeper understanding of the region’s geology and new insights in volcanic eruption prediction, disaster preparedness, and the environmental effects of mining.