A portable differential thermal analysis unit for bauxite exploration
S. B. Hendricks, R. A. Nelson
1946, Economic Geology (41) 64-76
A small differential thermal analysis unit that embodies the fundamental features of larger laboratory models is designed for field exploration for bauxite and related materials. The apparatus, requiring only a source of electrical power, combines portability with ease of operation and rapid analysis. The portable unit is suitable for quantitative...
Contribution to the petrography of Haleakala Volcano, Hawaii
G. A. Macdonald, H. A. Powers
1946, GSA Bulletin (57) 115-124
The volcanic rocks of Haleakala Volcano comprise, from oldest to youngest, the Honomanu, Kula, and Hana volcanic series. The Honomanu volcanic series consists largely of olivine basalt, with less abundant basalt and picrite-basalt containing large phenocrysts of olivine. In the Kula and Hana volcanic series there are some basalts and...
Quartz crystal in Brazil
W. D. Johnston Jr., R.D. Butler
1946, GSA Bulletin (57) 601-650
The peak production of Brazilian quartz crystal was reached in 1943 when 2411 metric tons were exported. Minas Gerais, Goiaz, and Bahia are the principal producing states. Minor quantities are obtained from Espirito Santo and Northeastern Brazil.Primary veins and pegmatites yield secondary deposits of eluvial, colluvial, and alluvial origin. The...
Notes on determining the effective distance to a line of recharge
R.G. Kazmann
1946, Eos, Transactions, American Geophysical Union (27) 854-859
Increasing emphasis has been given in recent years to the installation of wells in sand and gravel deposits along perennial streams. Under favorable conditions water enters the aquifer from the adjacent stream so that the safe yield is not limited by recharge from local precipitation [see “References” at end of...
Activity of Parícutin volcano from April 12 to May 3, 1946
George C. Kennedy
1946, Eos, Transactions, American Geophysical Union (27) 410-411
The activity of Parícutin varied greatly during the period April 12 to May 3. The strong eruptive activity that began in mid‐March, marked on March 17 by the formation of a new boca with a short‐lived volcancito and by external changes in the form of the cone, continued until April...
Hydrology in relation to economic geology
O. E. Meinzer
1946, Economic Geology (41) 1-12
No abstract available....
Veterans' retraining program in geology
Wilmont H. Bradley
1946, Economic Geology (41) 86-87
No abstract available....
Radial flow in a leaky artesian aquifer
C. E. Jacob
1946, Eos, Transactions, American Geophysical Union (27) 198-208
A partial differential equation is set up for radial flow in an elastic artesian aquifer into which there is vertical leakage in proportion to the drawdown. This differential equation is integrated to obtain two steady state solutions, one for the case of a well in an infinite aquifer, and the...
The glacial anticyclone theory examined in the light of recent meteorological data from Greenland—Part I
Francois E. Matthes
1946, Eos, Transactions, American Geophysical Union (27) 324-341
The glacial anticyclone theory, which William H. Hobbs propounded in 1910, is today still the only definitely formulated theory concerning the atmospheric movements that take place over an ice sheet of large extent. It stands chiefly on deductive grounds and contains several features that to climatologists as well as to...
Report of committee on Glaciers, 1945
Francois E. Matthes
1946, Eos, Transactions, American Geophysical Union (27) 219-233
To Preston P. Macy, Superintendent of Olympic National Park, the Committee is indebted for the first data on the recession of the Blue Glacier, one of the major ice streams on Mount Olympus. Annual measurements to its terminus were begun in 1938, the year in which Olympic National Park was...
Appendix A—Report of the subcommittee on permeability
C. E. Jacob
1946, Eos, Transactions, American Geophysical Union (27) 245-256
The Subcommittee on Permeability of the Permanent Research Committee on Ground Water of the Section of Hydrology, was organized in 1943 to provide for the open discussion of the terminology relating to permeability with a view toward the elimination of conflicting usages and the clarification and standardization of acceptable terms....
Appendix B—Notes on the permeability coefficient and its units
V.C. Fishel
1946, Eos, Transactions, American Geophysical Union (27) 256-269
In the development of terms and units for a new science such as ground‐water hydrology, which is based on physics, it would seem fitting to adopt the terminology that has become standard in other branches of physics such as heat and electricity. Darcy's law has its counterpart in similar laws...
Appendix D—Notes on Darcy's law and permeability
C. E. Jacob
1946, Eos, Transactions, American Geophysical Union (27) 265-673
In any effort to establish nomenclature relating to the flow of fluids through porous media it would seem well first to consider the history of the development of our concepts and of the terms or expressions involved. Only in this way can precedent rightfully be honored and at the same...
Appendix E—List of current publications concerning ground water
Jean M. Berdan
1946, Eos, Transactions, American Geophysical Union (27) 274-278
Alexander, W. H., Jr., Broadhurst, W. L., and White, W. N., Progress report on ground water In the High Plains in Texas, Tex. State Bd. Water Engrs., 12 pp., 7 tigs. (mimeogranhedl May 1944.Ashley, George H.,and Graham, Jack B., Groundwater investigations in Pennsylvania Pa. Dep. Internal Affairs, Monthly Bull., v....
Report of Committee on Ground Water—1944–1945
S. W. Lohman
1946, Eos, Transactions, American Geophysical Union (27) 236-245
Because of war‐imposed responsibilities of most agencies and individuals this year, no new programs were undertaken by the Committee, but the work of the Subcommittee on Permeability was continued, and a substantial progress report by C. E. Jacob, Acting Chairman, and by members of this Subcommittee follows this report as...
Great Salt Lake: A selected bibliography with annotations
Ray E. Marsell
1946, Eos, Transactions, American Geophysical Union (27) 103-107
Explorers began to push into the vast uncharted areas of the West in 1804, when Captains Lewis and Clarke ascended the Missouri River, crossed the Rocky Mountains into the headwaters of the Columbia River, and followed that stream to the Pacific Ocean. The honor of being the first white man...
Discussion of “Forecasting stream‐flow of the Salt River, Arizona”
M. I. Rorabaugh
1946, Eos, Transactions, American Geophysical Union (27) 441-443
Matthew I. Rorabaugh (U.S. Geological Survey, Louisville, Kentucky, August 27, 1945)—In regions where snow is not a factor there is some advantage in making forecasts based on the effects of travel time and base flow. However, the runoff which results from precipitation during the period of forecast usually constitutes a...
Report of Committee on Runoff—1944–1945
R. W. Davenport
1946, Eos, Transactions, American Geophysical Union (27) 121-123
The membership of the committee has been selected to afford good representation of geographic sections and of organizations engaged in runoff research. Some new members were added during the year in order to strengthen the representation of the committee in certain phases of runoff research. Norbert H. Leupold submitted his...
Report of the Research Committee on Runoff, 1945–46
R. W. Davenport
1946, Eos, Transactions, American Geophysical Union (27) 876-878
The variety of usage and even the confusion in the nomenclature and terminology of some fields of hydrology have been often remarked. The Committee on Runoff conceived the idea that it would be profitable to consider some of the terms which are especially pertinent to the field of runoff. That...
A generalized graphical method for evaluating formation constants and summarizing well‐field history
H.H. Cooper, C. E. Jacob
1946, Eos, Transactions, American Geophysical Union (27) 526-534
The capacities of a water‐bearing formation to transmit water under a hydraulic gradient and to yield water from storage when the water table or artesian pressure declines, are generally expressed, respectively, in terms of a coefficient of transmissibility and a coefficient of storage. Determinations of these two constants are almost...
Activities in tectonics of Research Committee of American Association of Petroleum Geologists
P.B. King
1946, Eos, Transactions, American Geophysical Union (27) 713-714
During 1945 and 1946, the Research Committee of the American Association of Petroleum Geologists, under the chairmanship of Shepard W. Lowman, has been engaged in “a reconnaissance survey of research in petroleum geology and allied sciences with explicit reference to exploration” in order “to formulate a comprehensive research program which...
Structural control of ore bodies in the Jefferson City area, Tennessee
A.L. Brokaw, Charles Leslie Jones
1946, Economic Geology (41) 160-165
The zinc deposits of the Jefferson City area are confined to the lower half of the Kingsport formation of the Knox group of rocks. They are on the southeast flank of a northeast-trending anticline which is partially overridden from the southeast by the Bays Mt. thrust sheet. The beds show...
Sedimentary and volcanic processes in the formation of high alumina clay
Victor T. Allen
1946, Economic Geology (41) 124-138
In the West, where volcanic materials are abundantly distributed among the rocks of the geologic column, the importance of sedimentary processes in the formation of high-alumina clays has not been fully appreciated. At Ione, Calif., Castle Rock, Wash., Whiteware, Mont., Hobart Butte and Mollala, Oreg., where the Geological Survey has...
Stages and epochs of mineralization in the San Juan Mountains, Colorado, as shown at the Dunmore Mine, Ouray County, Colorado
Vincent Cooper Kelley, Caswell Silver
1946, Economic Geology (41) 139-159
The Dunmore lode is localized along a persistent fissure zone over two miles long and averaging nearly 100 feet in width along the length of the Dunmore claim. The fault in which the lode is located offset the pre-Cambrian quartzite and slate walls about 4,500 feet prior to deposition of...
Preliminary chemical correlation of chromite with the containing rocks
Thomas P Thayer
1946, Economic Geology (41) 202-217
Chromite investigations of the U. S. Geological Survey since 1939 indicate that economic deposits of chromite rich in normative spinel ((Mg, Fe)Al 2 O 4 ) occur in peridotites which are closely associated with gabbro; high-chrome chromites occur in feldspar-free peridotites; and chromites rich in both normative chromite ((Mg, Fe)Cr 2 O 4 ) and magnetite (FeFe 2 O 4 ) are...
