← Search
Cretaceous and Paleocene potassium-argon mineral ages of the northernPioneer Batholith and nearby igneous rocks in Southwest Montana
Marvin, Richard F; Zen, E-An; Hammarstrom, Jane; Mehnert, Harald H (1983) Cretaceous and Paleocene potassium-argon mineral ages of the northernPioneer Batholith and nearby igneous rocks in Southwest Montana. Isochron/West, vol.38, pp.11-16, Dec 1983
| Authors | Marvin, Richard F; Zen, E-An; Hammarstrom, Jane; Mehnert, Harald H |
|---|
| Year | 1983 |
|---|
| Title | Cretaceous and Paleocene potassium-argon mineral ages of the northernPioneer Batholith and nearby igneous rocks in Southwest Montana |
|---|
| Source | Isochron/West, vol.38, pp.11-16, Dec 1983 |
|---|
| ISSN | 0099-6882 |
|---|
| GeoRef | 1984-034182 |
|---|
| Keywords | absolute age; amphibole group; basalts; Beaverhead County Montana;biotite; Cenozoic; chain silicates; clinoamphibole; Cretaceous; dates;diorites; felsite; geochronology; granites; granodiorites; hornblende;igneous rocks; K/Ar; Mesozoic; mica group; Montana; northern PioneerBatholith; Paleocene; Paleogene; Pioneer Batholith; Pioneer Mountains;plutonic rocks; quartz diorites; rhyodacites; sheet silicates;silicates; southwestern Montana; Tertiary; tonalite; United States;volcanic rocks; whole rock |
|---|
19 samples from this reference
