Basin and range structure: A system of horsts and grabens produced by deep-seated extension
John H. Stewart
1971, Bulletin of the Geological Society of America (82) 1019-1043
Basin and Range structure can be interpreted as a system of horsts and grabens produced by the fragmentation of a crustal slab above a plastically extending substratum. According to this view, the extension...
The age of porphyry-type copper mineralization in the Bingham mining district, Utah — A refined estimate
William J. Moore, Marvin A. Lanphere
1971, Economic Geology (66) 331-334
No abstract available....
Flooded area of Lake St. Croix Beach, Minnesota
G.H. Carlson
1971, Report
No abstract available....
Sierra Nevada plutonic cycle: Part I, origin of composite granitic batholiths
R. W. Kistler, J. F. Evernden, H. R. Shaw
1971, Bulletin of the Geological Society of America (82) 853-868
Intrusion of Mesozoic batholiths in California and the western North America Cordillera began in the Late Triassic 210 m.y. ago and ended in the Late Cretaceous 80 m.y. ago. Emplacement of granitic rocks was apparently not continuous but was accomplished during five major epochs of...
Sierra Nevada plutonic cycle: Part II, tidal energy and a hypothesis for orogenic-epeirogenic periodicities
H. R. Shaw, R. W. Kistler, J. F. Evernden
1971, Bulletin of the Geological Society of America (82) 869-895
The dissipative power of the solid earth tides is the order of 1019 ergs/sec, or a few percent of terrestrial heat flow. It is proposed that this energy is concentrated along oceanic ridge systems and in the asthenosphere by mechanisms of viscous dissipation involving shear melting....
Sedimentary and gravity-slide emplacement of serpentinite
J. P. Lockwood
1971, Bulletin of the Geological Society of America (82) 919-936
Large deposits of serpentinite in alpine-type orogenic areas have been formed by sedimentary processes ranging from the detrital accumulation of bedded serpentinite sandstone and shale to the emplacement of chaotic breccias (olistostromes) and gigantic slide blocks. Known occurrences of sedimentary serpentinite are listed, and eight deposits from the circum-Pacific, Caribbean,...
Flooded area of Montevideo, Minnesota
G.H. Carlson
1971, Report
No abstract available....
Thrust and strike-slip faulting in the Plomosa Mountains, southwestern Arizona
F. K. Miller, Edwin H. McKee
1971, Bulletin of the Geological Society of America (82) 717-722
Thrust and strike-slip faulting are recognized in the Plomosa Mountains, southwestern Arizona. The distribution of rock types and the geometry of the thrust faults necessitate that the upper plate moved from east to west. The amount of displacement is not known, but is considered to...
A shortcut for computing stream depletion by wells using analog or digital models
O. James Taylor
1971, Groundwater (9) 9-11
Theory indicates that the effect of a discharging well on a nearby stream is independent of the length of the reach. The theory was confirmed using a digital computer model of short and long reaches of a stream-aquifer system. Digital computations using short reaches of most...
Nomenclature and correlation of some upper Precambrian and basal Cambrian sequences in western Utah and southeastern Idaho
Max D. Crittenden Jr., Frederick E. Schaeffer, D. E. Trimble, Lee A. Woodward
1971, Bulletin of the Geological Society of America (82) 581-602
Recent stratigraphic studies in three widely separated localities in southeastern Idaho and western Utah have revealed a startling continuity of both individual rock units and of rock sequences over a distance of some 300 mi parallel to the strike of a late Precambrian and Cambrian depositional trough. Between 15,000 and...
A further revision of the stratigraphic nomenclature of the Wissahickon Formation in Maryland
Michael W. Higgins, George Wescott Fisher
1971, Bulletin of the Geological Society of America (82) 769-774
The Wissahickon Formation, the thickest and most extensive unit of the Glenarm Series, was divided into lithofacies several years ago. We suggest revision of two of these lithofacies and addition of another. We also suggest that the term lithofacies be shortened to facies. The added...
The functional significance of movements and positions of the pinnae of the African Elephant, Loxodonta africana
I.O. Buss, James A. Estes
1971, Journal of Mammalogy (52) 21-27
Observations of wild African elephants (Loxodonta africana) in Uganda indicated that flapping and spreading the highly vascularized ears are probably important functions for heat dissipation. Ear flapping increased as ambient temperatures rose and decreased or ceased during cold or rainy weather. Rate of ear flapping was inversely related to wind...
Water resources data for South Dakota, water year 1970; Part 1, Surface water records
1971, Water Data Report SD-70-1
No abstract available. ...
Deformation of lee-side laminae in eolian dunes
Edwin D. McKee, John R. Douglass, Suzanne Rittenhouse
1971, Bulletin of the Geological Society of America (82) 359-378
Processes responsible for structures in sand dunes consist of (l) primary deposition by saltation and creep and by settling from suspension, (2) redeposition accompanying avalanching, and (3) penecontemporaneous erosion. Characteristics of dune structures were examined in the field by introducing marker beds of magnetite at times of sand deposition, thus...
Data file, Continental Margin Program, Atlantic Coast of the United States: vol. 2 sample collection and analytical data
John C. Hathaway
1971, Report
The purpose of the data file presented below is twofold: the first purpose is to make available in printed form the basic data relating to the samples collected as part of the joint U.S. Geological Survey - Woods Hole Oceanographic Institution program of study of the Atlantic continental margin...
Related strontium isotopic and chemical variations in oceanic basalts
Zell E. Peterman, Carl E. Hedge
1971, Bulletin of the Geological Society of America (82) 493-499
Sr87/Sr86 values in oceanic basalts range from 0.7012 to 0.7057 and correlate with basalt composition as measured by the ratio K2O/(Na2O + K2O). The distribution of data points on this plot can be approximated by the following ranges in Sr87/Sr86 and K2O/(K2O + Na2O) respectively: (l) ocean...
A paleohydrologic model for mineralization of the White Pine copper deposit, northern Michigan
Walter S. White
1971, Economic Geology (66) 1-13
Pertinent physical properties of the upper Keweenawan rocks can be measured or inferred within a sufficiently narrow range to make the quantitative evaluation of various paleohydrologic models for the origin of the White Pine copper deposit feasible. The approach is illustrated here by calculations for...
Fluid inclusion studies on the porphyry-type ore deposits at Bingham, Utah, Butte, Montana, and Climax, Colorado
Edwin Roedder
1971, Economic Geology (66) 98-120
Data are given on the composition, temperature, pressure, and density of the hydrothermal fluids present in the central Cu-Mo core of the deposit at Bingham, Utah, and in its related but not necessarily coeval peripheral Pb-Zn deposits. These data are based on a study of...
Vapor-dominated hydrothermal systems compared with hot-water systems
D. E. White, L.J. Patrick Muffler, A. H. Truesdell
1971, Economic Geology (66) 75-97
No abstract available....
Coronadite — Modes of occurrence and origin
D. F. Hewett
1971, Economic Geology (66) 164-177
The lead manganate, "coronadite," was first recognized at the Coronado mine in the Morenci district, Arizona, by Lindgren in 1903. Several years later, the identity of the mineral was questioned and it was not until 1932 that Orcel recognized it in material from Morocco. Since...
Sulfur isotope study of the "B" limestone and Galena fissure ore deposits of the U.S. mine, Bingham mining district, Utah
Cyrus W. Field, William J. Moore
1971, Economic Geology (66) 48-62
The delta S 34 values for 261 sulfide concentrates from the "B" limestone replacement and Galena fissure deposits of the U. S. mine range from +3.8 to --8.0 permil; the mean is +0.56 permil. The data indicate that (1) sulfides of the "B" limestone ore deposits are...
Cation exchange capacity and metal deposition: A suggestion — A reply
Arthur S. Radtke, Bernard J. Scheiner
1971, Economic Geology (66) 201-201
No abstract available....
Residual enrichment and supergene transport of gold, Calhoun mine, Lumpkin County, Georgia
Frank G. Lesure
1971, Economic Geology (66) 178-186
Gold is present in weathered wall rock and quartz veins of the opencut of the Calhoun mine, Lumpkin County, Georgia. Eleven samples of mica schist saprolite contain 0.02 to 0.1 parts per million (ppm) gold and three samples of weathered vein quartz, 0.04 to 0.6...
Application of an acoustic streamflow-measuring system on the Columbia River at The Dalles, Oregon
Winchell Smith
1971, Journal of the American Water Resources Association (7) 69-78
The need for accurate, independent records of flow on the Columbia River at The Dalles, Oregon, has been met by the installation of an acoustic streamflow-measuring system. This device provides an index of the velocity of flow by...
Pacific geomagnetic secular variation
Richard R. Doell, A. Cox
1971, Science (171) 248-254
We have considered several different types of records of long-period geomagnetic secular variation: direct measurements made in geomagnetic observatories; paleomagnetic measurements on Hawaiian lava flows with accurately known ages in the interval 0 to 200 years; paleomagentic measurements on Hawaiian lava flows with loosely determined ages within the interval 200...
