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Volume 85, Number 12
December, 1974
GSA Bulletin Cover Image for Volume 85, Issue 12
ISSN: 0016-7606
EISSN: 1943-2674
In this Issue
The Founding of Geology in America: 1771 to 1818
ROBERT M. HAZEN
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Evidence for Eolian Origin of Cross-Stratification in Sandstone of the Casper Formation, Southernmost Laramie Basin, Wyoming
JAMES R. STEIDTMANN
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Extinction of the Shasta Ground Sloth
AUSTIN LONG; RICHARD M. HANSEN; PAUL S. MARTIN
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Relict and Recent Beachrock from Southern Africa
WILLIAM G. SIESSER
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Experimental Test of Least-Squares Strain Gage Calculation Using Twinned Calcite
RICHARD H. GROSHONG, JR.
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Squirrel Springs Volcano-Tectonic Depression: A Buried Cauldron in Southwestern New Mexico
EUGENE I. SMITH; RODNEY C. RHODES
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Giant Stromatolites and Associated Vertical Tubes from the Upper Proterozoic Noonday Dolomite, Death Valley Region, Eastern California
PRESTON CLOUD; L. A. WRIGHT; E. G. WILLIAMS; PAUL DIEHL; M. R. WALTER
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Offset Plutons and History of Movement along the McKinley Segment of the Denali Fault System, Alaska
BRUCE L. REED; MARVIN A. LANPHERE
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Tectonic Elements of the Central Part of the Gulf of California
JAMES L. BISCHOFF; THOMAS L. HENYEY
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Stratigraphic Value of Silicoflagellates in Nontropical Regions
DAVID BUKRY
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Magnetic Studies on Lake Tahoe, California-Nevada
T. L. HENYEY; D. F. PALMER
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Paleozoic and Lower Mesozoic Volcanism and Continental Growth in the Western United States
JOHN J. W. ROGERS; B. C. BURCHFIEL; E. W. ABBOTT; J. K. ANEPOHL; A. H. EWING; P. J. KOEHNKEN; J. M. NOVITSKY-EVANS; S. C. TALUKDAR
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Composition and Time Relations of Plutonic and Associated Volcanic Rocks, Boulder Batholith Region, Montana
ROBERT I. TILLING
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Model for the Late Cenozoic Tectonic History of the Mojave Desert, California, and for Its Relation to Adjacent Regions
ZVI GARFUNKEL
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Middle Cretaceous Nappe Structures in Puerto Rican Ophiolites and Their Relation to the Tectonic History of the Greater Antilles: Discussion
K. M. KHUDOLEY; A. A. MEYERHOFF
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Evaporite-Carbonate Rocks of the Jurassic Lovelock Formation, West Humboldt Range, Nevada: Discussion
J. F. HAVARD
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Nature of the Boulder Batholith of Montana: Discussion
M. R. KLEPPER; G. D. ROBINSON; H. W. SMEDES
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Circum-Caribbean Tectonic and Igneous Activity and the Evolution of the Caribbean Plate: Discussion
MANUEL A. ITURRALDE-VINENT
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Use of Chi-Square for the Identification of Peaks in Orientation Data: Comment
A. M. HAY; M. A. ABDEL RAHMAN
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DISCUSSION AND REPLY

Reply
PETER H. MATTSON
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WARREN HAMILTON; W. BRADLEY MYERS
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ERRATUM

Corrections and Emendations: Volume 85
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  • Online ISSN 1943-2674
  • ISSN 0016-7606
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