Vol. 259, Issue 5, 1961 | Published by American Journal of Science

Climatic Changes Since the Last Interglacial

Richard Foster FlintFriedrich Brandtner

Six curves, from European and American localities, showing inferred fluctuations of climate (chiefly temperature) during various segments of the time since the last interglacial, are compared. The curves are time...

Science Paper

High Temperature Acid Rocks Associated With Serpentinite in Eastern Quebec

Edward John Olsen

Highly serpentinized alpine-type peridotites frequently have small, relatively acid rock lenses associated with them. Weakly serpentinized or unserpentinized peridotites are usually associated with segregations of olivine gabbro. A study of...

Science Paper
Diabasic and Gabbroic Intrusions in the Frost Mountain Area, South-Central Cascade Mountains, Washington
Martin Lindy Stout
Diabasic and gabbroic intrusions in the Frost Mountain area, approximately 70 mi. SE. of Seattle, represent at least in part feeders for 2 different sets of basalt flows. The older...
Science Paper
Variation in Composition of Biotite and Actinolite From Nonmineralic Contact Bands Near Westfield, Massachusetts
Arthur H. Brownlow
...
Science Paper
Microstriations on Polished Pebbles
Sheldon JudsonRonald E. Barks
Very small striations, here called microstriations, occur on the smooth, polished surfaces of some pebbles. They average a millimeter or less long and are commonly less than 0.05 mm. wide....
Science Paper
Relationship Between Concentric Longitudinal Strain and Concentric Shearing Strain During Folding of Homogeneous Sheets of Rocks
Hans Ramberg
For folds with a small amplitude/wave length ratio in homogeneous, isotropic, Newtonian media, concentric shearing strain in the flanks is related to the maximum concentric longitudinal strain through the layer...

Science Paper

The Nature of Micrometeorites

E. L. Krinov

Meteorite showers are usually caused by the fragmentation of one large meteorite in its rapid course through our atmosphere, rather than by the invasion of a swarm of initially discrete...

Science Paper

Discussion of ‘a Petrofabric Analysis of a Fold,’ by T. K. Ball, 1960

Dhrubajyoti Mukherjee

A final fold form described in the literature as due to flexure following shear is interpreted instead as due to flexure and concomitant shearing on the axial plane, or possibly...

Science Paper

Reply [to Discussion of D. Mukherjee]; a Petrofabric Analysis of a Fold

T. K. Ball

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