USGS Science⌕ Search

Geology topics

James R. Balsley

Publications and source records attributed to James R. Balsley.

34 records · Page 2Linked to original sources
USGS1959

Magnetostriction and palæomagnetism of igneous rocks

IN a recent communication, Stott and Stacey 1 report on a “crucial experiment” from which they conclude: “This excellent agreement between the dip and the directions of artificial thermoremanent magnetization of the stressed and unstressed rocks indicates that large systematic errors due to magnetostriction are most improbable in igneous rocks of types normally used for palæomagnetic work”. This experiment was intended to test the proposals 2 and measurements 3 bearing on the role of magnetostriction in rock magnetism. We present here our reasons for believing that the experiment was not crucial and that the conclusion is not justified.

Nature↗
USGS1948

Distribution of coastal black-sands in North Carolina, South Carolina, and Georgia, as mapped from an airplane

Black-sand beach concentrates are more widely distributed along the beaches of North Carolina, South Carolina, and Georgia than has been recorded heretofore, as shown by a map prepared by airplane reconnaissance. The map shows also that the black sands diminish in abundance northward, that their distribution is in part related to the configuration of the shoreline, and that they are found only on beaches along the open sea.

Georgia, North Carolina, South Carolina↗