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