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Early tertiary age of pitchstone in the Northern Black Hills, South Dakota

Science

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Abstract

A block of pitchstone in the northern Black Hills, South Dakota, is Paleocene in age, according to potassium-argon dating of biotite and fission-track dating of zircon in the sample. These data invalidate published suggestions that the age is much younger. The pitchstone is not extrusive in its present position but instead is in a volcanic pipe with other fragments that came downward from as much as 1100 meters above the modern surface.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Early tertiary age of pitchstone in the Northern Black Hills, South Dakota
Series title:
Science
Volume
220
Issue:
4602
Year Published:
1983
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Science
First page:
1153
Last page:
1154
Number of Pages:
2