GRD00AYS0

I-422

Foid-Bearing Extrusive

Cenozoic › Quaternary › Pleistocene
0.01 - 2.6

0

Ritter 154 › Cabinet 20 › Drawer I

Porphyritic

Leucite Phenocrysts, some hornblende TSB only 0.9-3.1 Ma

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Wyoming
Rattlesnake Hills
Latitude: 42.8°
Longitude: -107.4°

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