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Zoning of ore deposits in and adjoining the Leadville District, Colorado
The ore deposits in the heart of the Leadville district, Colorado, are divisible, as shown by Emmons, Irving, and Loughlin,2 into two main classes on the basis of mineral composition: "contact-metamorphic" silicates accompanied by iron oxides, which adjoin an obscure igneous stock, and mixed sulphides accompanied by manganosiderite and quartz gangue, which cut the "contact-metamorphic" deposits an
Authors
G. F. Loughlin, C. H. Behre
Mineral resources of Alaska: report on progress of investigations in 1932
No abstract available.
Authors
Philip S. Smith
Structural history of the fracture systems at Grass Valley, California
In the foregoing outline of the structural history of the Grass Valley intrusive the vein fractures are regarded as elements of the internal tectonics of the intrusive body itself. They originated in an early stage of the structural development of the region, and are equivalent to the marginal thrusts observed in the Yose-mite and along the Mother Lode system. As such, the vein fractures are of lo
Authors
W. D. Johnston, E. Cloos
Contributions to economic geology (short papers and preliminary reports), 1933
No abstract available.
Authors
Gerald F. Loughlin
A flora of Pottsville age from the Mosquito Range, Colorado
No abstract available.
Authors
C.B. Read
A fungus disease in fishes of the Gulf of Maine
1. A fungus disease of epidemic proportions was found in the common sea herring (Clupea harengus) throughout the Gulf of Maine.
2. The fungus was also found to infect the common winter flounder (Pseudopleuronectes americanus) and the alewife (Pomobolus pseudoharengus).
3. The causative agent was found to be a species of fungus belonging to the genus Ichthyosporidium Caullery and Mesnil (1905). The
Authors
F. F. Fish
A microprojection machine designed for the study of fish scales
Abstract has not been submitted
Authors
John Van Oosten, Hilary J. Deason, Frank W. Jobes
Artesian water in Somervell County, Texas
Somervell County is part of the Grand Prairie region of north-central Texas. An excellent supply of artesian water is available from the Trinity reservoir at no great depth. The first flowing well in Somervell County was drilled in 1880, and the first flowing well in Glen Rose, the county seat, was drilled in 1881. Since 1880 more than 500 wells have been constructed, probably more than half of th
Authors
Albert George Fiedler
Bibliography of North American geology, 1931 and 1932
No abstract available.
Authors
John M. Nickles
Causes of variation in the growth rates of fishes
Abstract has not been submitted
Authors
Ralph Hile