Science, Том 23John Michels (Journalist) American Association for the Advancement of Science, 1894 Since Jan. 1901 the official proceedings and most of the papers of the American Association for the Advancement of Science have been included in Science. |
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Стр. 17
... ROCKS IN THE KEEWATIN OF MIN- NESOTA.1 BY ULYSSES SHERMAN GRANT , MINNEAPOLIS , MINN . THAT the Keewatin rocks northwest of Lake Superior are to a considerable extent composed of volcanic ( effusive ) material has been stated already by ...
... ROCKS IN THE KEEWATIN OF MIN- NESOTA.1 BY ULYSSES SHERMAN GRANT , MINNEAPOLIS , MINN . THAT the Keewatin rocks northwest of Lake Superior are to a considerable extent composed of volcanic ( effusive ) material has been stated already by ...
Стр. 32
... rocks , failed to show any evidence of heat or local metamorphism of any kind . Transition rocks found in the immediate vicinity , as well as in other parts of the district , seem to furnish most of the links between these eruptive ...
... rocks , failed to show any evidence of heat or local metamorphism of any kind . Transition rocks found in the immediate vicinity , as well as in other parts of the district , seem to furnish most of the links between these eruptive ...
Стр. 142
... rocks which does not prevent us looking on other rocks as igneous which are crystalline . An example of a pure quartz vein cutting like a dyke the igneous rocks of Chamwood Forest , Leicestershire , which I have examined , shows a ...
... rocks which does not prevent us looking on other rocks as igneous which are crystalline . An example of a pure quartz vein cutting like a dyke the igneous rocks of Chamwood Forest , Leicestershire , which I have examined , shows a ...
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Meeting of the Iowa Academy of Sciences | 10 |
ROUGHING IT WITH AN ECLIPSE PARTY | 42 |
ESTERBROOKS | 56 |
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