Petrology of McKinney Basalt, Snake River Plain, Idaho
Leeman W and Vitaliano CJ. 1976. Petrology of McKinney Basalt, Snake River Plain, Idaho. Geologic Society of America Bulletin. 87(12):1777-1792
The McKinney Basalt, a composite pahoehoe and pillow lava unit in the Snake River Plain, has been studied by petrographic, chemical, strontium-isotopic, and experimental methods in an attempt to define its origin and evolutionary history. Differences in the compositions of olivine and plagioclase phenocryst cores and in the whole-rock composition of different samples are interpreted as evidence that McKinney Basalt erupted as sequential surges of lava that represent different degrees of fractional crystallization of an olivine tholeiite parental magma.
- Type
- Journal Article
- Authors
- Leeman, WP; Vitaliano, C
- Units
- CRMO
- Keywords
- Idaho, Mckinney Basalt, Olivine, Petrology/Mineralogy, Snake River Plain