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Stratigraphy and paleontology of the Upper Carboniferous rocks of the Kansas section
No abstract available.
Authors
George Irving Adams, George Herbert Girty, David White
The Carboniferous formations and faunas of Colorado
In the following pages the geology and paleontology of the Carboniferous rocks of Colorado are discussed from the viewpoint of the stratigraphic paleontologist. This viewpoint is also that of one not personally acquainted with the field in question, except in very small measure. I made or assisted in making a few collections of fossils, and enjoyed the privilege of being connected for a month with
Authors
G. H. Girty
The clays of the United States east of the Mississippi River
NATURE OF CLAY.
The term clay is applied to a natural substance or rock which, whenfinely ground and mixed with water, forms a pasty, moldable mass that preserves its shape when air dried, and when burned changes to a hard, rock-like substance by the coalescence of its particles, through softening under the action of heat.
A microscopic examination of clay shows that it is made up of a great numbe
Authors
Henrich Ries
The correlation of geological faunas, a contribution to Devonian paleontology
No abstract available.
Authors
Henry Shaler Williams
The geological society of American Universities
[No abstract available]
Authors
R. Arnold, W. C. De Wlley
The mineral resources of the Mount Wrangell district, Alaska
The Tenth Census, taken in 1880, gives the number of white inhabitants of the Territory of Alaska as 430. In the decade from 1880 to 1890 this number had increased to 4,298, and in the following decade, that between 1890 and 1900, a further increase to 30,493 is recorded. The Director of the Mint in his report for 1891 gives the value of the yield of the Territory in precious metals as $772,197. B
Authors
W. C. Mendenhall, F. C. Schrader