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Page 6466, results 161626 - 161650

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Rock formations in the Colorado Plateau of Southeastern Utah and Northern Arizona
C.R. Longwell, H.D. Miser, R.C. Moore, Kirk Bryan, Sidney Paige
1925, Professional Paper 132-A
The field work of which this report is a record was done in the summer and fall of 1921 by members of the United States Geological Survey. A project to build a large storage dam at Lees Ferry, on Colorado River in northern Arizona, called for a detailed topographic survey...
Origin of the boghead coals
Reinhardt Thiessen
1925, Professional Paper 132-I
The bituminous rocks of sedimentary origin may be classified roughly under two main heads - coals and bituminous shales. In a strict sense no definite line can be drawn between these two groups, because coals may be insensibly grade into bituminous shales. Chemically the boghead coals are preeminently bituminous....
An early Eocene florule from central Texas
Edward Wilber Berry
1925, Professional Paper 132-E
In 1916 I described a florule collected by Alexander Deussen and L. W. Stephenson at the town of Earle, in Bexar County, Tex. This florule was tentatively considered of Midway age by these geologists, and examination of the fossil plants tended to confirm this assignment, particularly because of their lack...