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. 107
... origin . I might certainly have made the matter plainer had I specified those rocks in the group which there were reasons for supposing to be of volcanic origin . It never occurred to me , however , that in giving a general description ...
... origin . I might certainly have made the matter plainer had I specified those rocks in the group which there were reasons for supposing to be of volcanic origin . It never occurred to me , however , that in giving a general description ...
Стр. 142
... origin , it shows that siliceous water was percolating rocks in the district . But of more importance is the occurrence of pebbles of jasper , and large ones of pure vein quartz in these Huronian quartz- The former mineral is not an ...
... origin , it shows that siliceous water was percolating rocks in the district . But of more importance is the occurrence of pebbles of jasper , and large ones of pure vein quartz in these Huronian quartz- The former mineral is not an ...
Стр. 157
... origin . Numerous cases were quoted of a gradual passage between sedimentary strata and granite ; and , as it was held to be incredible that a sediment could be produced from granite , it was inferred that the granite was an altered ...
... origin . Numerous cases were quoted of a gradual passage between sedimentary strata and granite ; and , as it was held to be incredible that a sediment could be produced from granite , it was inferred that the granite was an altered ...
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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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