Vol. 266, Issue 10, 1968 | Published by American Journal of Science

Isotopic Age Study of Metamorphism and Intrusion in Western Connecticut and Southeastern New York

George S. ClarkJ. Laurence Kulp

K-Ar and Rb-Sr ages for a variety of metamorphic and igneous rock types are reported. K-Ar ages range from 480 m.y. to 240 m.y. Three metamorphic events affected the region....

Science Paper

Rubidium-strontium Isochron Ages of the Crystalline Core of the Tatra Mountains, Poland

Jan Burchart

Absolute age of main quartz diorite massif of 290-300 m.y., whole rock isochron age of 420 m.y., absence of metamorphic recrystallization during late Cretaceous orogeny

Science Paper
Partial Melting of Common Rocks as a Possible Source of Cordierite-Anthophyllite Bearing Assemblages
James A. Grant
In a high grade regional metamorphic environment, partial melting and removal of melt will result in a residuum different in composition from the original rock. The possibility that these processes...
Science Paper
Liquid Immiscibility in the Join NaAlSi 3 O 8 -Na 2 CO 3 -H 2 O and Its Bearing on the Genesis of Carbonatites
A. F. Koster van GroosP. J. Wyllie
Phase relations in the above join were studied through the system Na 2 O-Al 2 O 3 -SiO 2 -CO 2 -H 2 O at 1 kb. Phases encountered were...
Science Paper
Oxygen Isotope Study of Calcite and Silicates of the River Ranch No. 1 Well, Salton Sea Geothermal Field, California
R. N. ClaytonL. J. P. MufflerDonald E. White
The effect of temperature variation on isotope fractionation has been studied in rock samples from a well in the Salton Sea geothermal area. A vertical profile of oxygen isotopic composition...
Science Paper
Identification and Solubility of Iron Sulfide in Anaerobic Lake Sediment
Roger W. Doyle
The iron sulfide that darkens the color of some anaerobic sediment has been tentatively identified as mackinawite (tetragonal FeS) in sediment from Linsley Pond, Conn. The mineral was identified by...

Science Paper

Time and Space Relationships of the Taconic Allochthon and Autochthon [Book Review]

D. B. Potter

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Science Paper

Introduction to Petrology [Book Review]

L. Lundgren

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Science Paper

Studies on Glaciers [Book Review]

G. H. Denton

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Science Paper
Loess Deposits of Mississippi [Book Review]
J. C. Frye
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Science Paper
Selected Papers in Soil Formation and Classification [Book Review]
G. K. Voigt
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