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The inorganic constituents of echinoderms
In a recent paper on the composition of crinoid skeletons we showed that crinoids contain large quantities of magnesia, and that its proportion varies with the temperature of the water in which the creatures live. This result was so novel and surprising that it seemed desirable to examine other echinoderms and to ascertain whether they showed the same characteristics and regularity. A number of se
Authors
F. W. Clarke, W. C. Wheeler
The Mesozoic and Cenozoic Echinodermata of the United States
No abstract available.
Authors
William Bullock Clark, Mayville William Twitchell
The Pleistocene of Indiana and Michigan and the history of the Great Lakes
This monograph describes the glacial features and the great glacial lakes of a district in Indiana and Michigan lying between the areas covered by Monographs XXXVIII, and XLI. The glacial features are treated mainly by Mr. Leverett, and the glacial lakes and their moraines by Mr. Taylor. The pre-Wisconsin glacial and interglacial formations are given attention, but the principal subject of discuss
Authors
Frank Leverett, Frank Bursley Taylor
The stratigraphy of the Montana group, with special reference to the position and age of the Judith River Formation in north-central Montana
No abstract available.
Authors
C. F. Bowen
Thirty-sixth annual report of the Director of the United States Geological Survey
The appropriations for the work of the United States Geological Survey for the fiscal year 1914-15 comprised items amounting to $1,620,520. The plan of operations was approved by the Secretary of the Interior, and a detailed statement of the work of the several branches and divisions of the Survey is presented on later pages of this report.
Authors
George Otis Smith
Underground waters of the coastal plain of Georgia
No abstract available.
Authors
Lloyd William Stephenson, J. O. Veatch, Richard B. Dole