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Page 6891, results 172251 - 172275

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A regional gravity survey of the Cuyuna Iron Range, Minnesota
George Austin Durfee
1957, Open-File Report 57-41
A regional gravity survey of the Cuyuna Iron Range, Minnesota, was conducted during the summer of 1955 by the U. S. Geological Survey. It was believed that gravity data would aid in the understanding of the major structures of the range. It was found that synclinal and steeply dipping structures...
A field method for the determination of calcium and magnesium in limestone and dolomite
Leonard Shapiro, Walter Wallace Brannock
1957, Open-File Report 57-99
The method is an adaptation of a procedure described by Betz and Noll1 in 1950. Calcium and magnesium are determined by visual titration using Versene (disodium ethylenediamine tetraacetate) with Murexide (ammonium purpurate) as the indicator for calcium and Eriochrome Black T as the indicator for magnesium....
Geology of the southern Elkhorn Mountains, Jefferson and Broadwater Counties, Montana
M. R. Klepper, R. A. Weeks, E. T. Ruppel
1957, Professional Paper 292
The geology of an area of about 270 square miles in the southern Elkhorn Mountains, west of Townsend in west-central Montana, is described. The mountains in the southern part of the area comprise northward-trending alternating ridges and valleys underlain principally by folded sedimentary rocks. They merge northward into the higher...
Geology and ground-water resources of Galveston County, Texas
Ben McDowell Petitt, Allen George Winslow
1957, Water Supply Paper 1416
Galveston County, on the Texas gulf coast, is underlain by alternating beds of sand and clay. These sand and clay strata crop out in belts that roughly parallel the coastline and dip gently southeastward at an angle gre? +,er than the slope of the land, thereby creating artesian aquifers. The...