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Page 6419, results 160451 - 160475

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Publication Extents

Not all publications have extents, not all extents are completely accurate
Sulphate minerals of the Comstock Lode, Nevada
C. Milton, W. D. Johnston Jr.
1938, Economic Geology (33) 749-771
Seventeen representative samples of supergene sulphates from old workings on the Comstock Lode are described. They range from simple minerals such as gypsum and epsomite to complex aggregates of four or more distinct species. All are well known species except a mineral of the copper (chalcanthite) or magnesium sulphate pentahydrate...
Dolomite and jasperoid in the Metaline District, northeastern Washington
Charles Frederick Park
1938, Economic Geology (33) 709-729
The replacement ore bodies of the Metaline zinc-lead district, in northeastern Washington are limited to the greatly disturbed fault block through which the Pend Oreille River flows and are associated with the major faults but are not in them. They are mostly near the top of the Metaline limestone, of...
Volcanic activity at Magnet Cove, Arkansas
C. S. Ross
1938, Eos, Transactions, American Geophysical Union (19) 263-264
The igneous rocks and the minerals of Magnet Cove, Arkansas, have long interested geologists and mineralogists, but in much of the area rock‐exposures are so sparse that many of the geologic, relations have remained obscure. However, recent prospecting and the mining of titanium ores have uncovered rocks that throw new...
Igneous activity in the Comstock District, Nevada
F. C. Calkins
1938, Eos, Transactions, American Geophysical Union (19) 262-262
The oldest igneous rocks in the Comstock District are amphibolites probably derived from basalts and of Triassic age. These are intruded by pre‐Tertiary quartz monzonlte and by granodiorite of Sierran facies, the latter not being exposed on the surface but found on mine‐dumps. Igneous activity recorded mainly in volcanic rocks...
Diabase dikes of the Franklin Furnace, New Jersey, quadrangle
C. Milton
1938, Eos, Transactions, American Geophysical Union (19) 264-264
Two of the numerous small dikes mapped on the areal geology sheet of the Franklin Furnace Folio (U.S. Geological Survey 161) as “Mostly basic, including nepheline tinguaite, leucite tinguaite, and camptonite” of post‐Ordovician age, have been found to be quite distinct from these alkalic rocks, and the two dikes in...
Role of physical chemistry in stratigraphic problems
George R. Mansfield
1938, Economic Geology (32) 335-549
Stratigraphy is concerned mainly with the genesis and interpretation of stratified rocks, which include some of wide extent and of great scientific as well as economic interest that are largely of chemical rather than of detrital origin. Chemical agencies have been recognized to some extent in genetic studies of these...
Precipitation and vegetation
Ralf R. Woolley, J.C. Alter
1938, Eos, Transactions, American Geophysical Union (19) 804-807
As time marches on, historians are usually quite faithful in recording the activities of man, and it will usually be found that Mother Nature is even more meticulous in reflecting and preserving her experiences, more especially with regard to climate and vegetation. Just how much the activities of man have...
A recording evaporimeter
J. Oliver, N.W. Cummings
1938, Eos, Transactions, American Geophysical Union (19) 609-612
The instrument herein described was originally designed and built to record the evaporation‐loss from a standard Weather Bureau pan for use in a study of the variation of flow in Santa Ana River. Valuable suggestions were made by various members of the Water Resources Branch of the Geological Survey in...
Ground‐water for air‐conditioning on Long Island, New York
R.M. Leggette, M.L. Brashears Jr.
1938, Eos, Transactions, American Geophysical Union (19) 412-418
During the last five years ground‐water has been more and more extensively used for air‐conditioning on Long Island, New York. The wide‐spread occurrence of highly permeable water‐bearing material and the relatively small cost of installation and operation of a ground‐water, air‐conditioning system has resulted in many such installations by theaters,...
Some mineral deposits of Glacier Bay and vicinity, Alaska
John Calvin Reed
1938, Economic Geology (33) 53-78
Prospecting in the Glacier Bay National Monument has been confined so far to granitic rocks near contacts with Paleozoic sediments, which they intrude.Near Reid Glacier thin veins, a few of which are traceable for about 300 feet both horizontaliy and vertically, trend northerly and carry sphalerite, galena, and pyrite. Gold...