Radiometric ages of intrusive rocks in the Little Belt Mountains, Montana
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Abstract
Radiometric ages indicate that most, if not all, of the major intrusions in the Little Belt Mountains, central Montana, were emplaced during the Eocene epoch, between 48 and 54 m.y. ago. In the Hughesville area, igneous activity continued, or was episodic until 42 m.y. ago. As a result of the continued igneous activity, radiometric ages in the Hughesville area can be interpreted either as primary ages or as reset ages.
Study Area
Publication type | Article |
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Publication Subtype | Journal Article |
Title | Radiometric ages of intrusive rocks in the Little Belt Mountains, Montana |
Series title | Geological Society of America Bulletin |
DOI | 10.1130/0016-7606(1973)84<1977:RAOIRI>2.0.CO;2 |
Volume | 84 |
Issue | 6 |
Year Published | 1973 |
Language | English |
Publisher | Geological Society of America |
Description | 10 p. |
First page | 1977 |
Last page | 1986 |
Country | United States |
State | Montana |
Other Geospatial | Little Belt Mountains |
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