Early tertiary age of pitchstone in the Northern Black Hills, South Dakota
Science
By: J. A. Redden, J. D. Obradovich, C.W. Naeser, R. E. Zartman, and J.J. Norton
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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.
| 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 |
| Google Analytic Metrics | Metrics page |