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Page 6283, results 157051 - 157075

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Not all publications have extents, not all extents are completely accurate
Clay deposits of the Tierra Colorado district, southern Orange County, California
Steven Norman Daviess, M. N. Bramlette
1953, Open-File Report 53-51
The clay of this district is being mined for fire brick by the Vitrofrax Corporation. Much of the clay contains 35 percent or more of alumina and between 1 and 2 percent of iron oxide. Production is largely from an underground mine as the best clay deposit known in the...
Stratigraphic relations of the Shakopee dolomite and the St. Peter sandstone in southwestern Wisconsin
Arthur Emerson Flint
1953, Open-File Report 53-71
This paper is concerned with the origin and geologic history of the boundary that separates the widespread St. Peter sandstone from the underlying Shakopee dolomite. That international surface is highly undulatory, and most contemporary geologists who have examined it believe that the contact irregularities result from pre-St. Peter subaerial erosion...
Results of exploration at the Old Leyden coal mine, Jefferson County, Colorado
A.J. Gude, F. A. McKeown
1953, Open-File Report 53-82
Six diamond core holes totaling 2, 201 feet were drilled by the. U, S. Bureau of Mines under contract to the U. S. Atomic Energy Commission at the Old Leyden coal mine, Jefferson County, Colo. The holes were spotted on the basis of geologic mapping by the U. S. Geological...
Niobium (columbium) and titanium at Magnet Cove and Potash Sulphur Springs, Arkansas
Verne Charles Fryklund Jr., R. S. Harner, E.P. Kaiser
1953, Open-File Report 53-74
This work was done because niobium (columbium) has been found in several of the minerals and rocks of the Magnet Cove and Potash Sulphur Springs areas. Niobium is in demand for use in high-temperature and non-creep steels.The Magnet Cove and Potash Sulphur Springs areas are in central Arkansas between Malvern...
Stratigraphy and structure of the Miners Mountain area, Wayne County, Utah
Robert G. Luedke
1953, Open-File Report 53-161
The Miners Mountain area includes about 85 square miles in Wayne County, south-central Utah. The area is semiarid and characterized by cliffs and deep canyons. Formations range in age from Permian to Upper Jurassic and have an aggregate thickness of about 3,500 feet. Permian formations are the buff Coconino sandstone and...
Correlation of the Cretaceous formations of Greenland and Alaska
Ralph Willard Imlay, John B. Reeside Jr.
1953, Open-File Report 53-135
This is Number 10d of a series of correlation charts prepared for the Committee on Stratigraphy of the National Research Council. It has been sponsored by the U.S. Geological Survey and has required about seven months' time of both authors gathering and compiling data and evaluating fossil evidence. As...
Observation of a "front" of regional metamorphism
Rene Perrin, Marcel Roubault, S. H. Britt (translator)
1953, Open-File Report 54-32
Drawing his inspiration from the theories on metamorphism by reaction in the solid state, and from some observations, Rene Perrin in his article 'Perrin, Rene, Le metamorphisms generateur de plissement, Annales des Hines, Paris, October 1935.' "Metamorphism, the generator of folding" stated in 1935: 1) that some "sudden arrest" of regional...
Geology of the Olds Mountain-Clark Peak area, Juneau and vicinity, Alaska
C.L. Sainsbury
1953, Open-File Report 53-231
The area under study lies about ten miles east of Juneau, Alaska, and includes the bedded rocks adjacent to the Coast Range batholith, and intrusive rocks related to the batholith. Deep glaciated valleys and glacially scoured rocks are the major topographic features. The relief is about 3,500 feet, and the highest...
Reconnaissance geology of placer deposits containing radioactive minerals in the Bear Valley district, Valley County, Idaho
J. Hoover Mackin, Dwight Lyman Schmidt
1953, Open-File Report 53-167
A reconnaissance of the Bear Valley district was undertaken to provide a geologic interpretation of placer deposits drilled by the U.S. Bureau of Mines. The placer minerals are monazite and a group of uranium bearing rare earth columbates and tantalates here referred to loosely as radioactive blacks. The monazite is...
The hydraulic geometry of stream channels and some physiographic implications
Luna Bergere Leopold, Thomas Maddock Jr.
1953, Professional Paper 252
Some hydraulic characteristics of stream channels - depth, width, velocity, and suspended load - are measured quantitatively and vary with discharge as simple power functions at a given river cross section. Similar variations in relation to discharge exist among the cross sections along the length of a river under the...