Peach Spring Tuff
The Peach Spring Tuff is a pyroclastic flow sheet deposit spanning 32,000 km2 in California, Arizona, and Nevada. The source of the Peach Spring Tuff is the Silver Creek Caldera located outside of Oatman, Az. The Silver Creek Caldera was found to be a match to the Peach Spring Tuff after an ignimbrite sample from within the caldera matched the phenocryst makeup and age of the Peach Spring Tuff. The caldera eruption is dated to the early Miocene, radiometrically dated to 18.78 +/- 0.02 Ma using argon-argon dating methods on sanidine crystals. The Peach Spring Tuff has a rhyolitic composition with thickness ranging from 10-140 m depending on location. The Peach Spring Tuff is the only geologic evidence of a super-eruption in this region.
Q221616
pyroclastic flow
Concept
Q99
California
LOC
Q816
Arizona
LOC
Q1227
Nevada
LOC
Q256438
ignimbrite
Concept
Q159954
caldera
Concept
Q383481
phenocryst
Concept
Q76267
Miocene
TIME
Q173412
radiometrically dated
Concept
Q190727
rhyolitic
Concept
Q61526481
Peach Spring Tuff
UNK
Q61526481
Peach Spring Tuff
UNK
Q61526481
Peach Spring Tuff
UNK
Q61526481
Peach Spring Tuff
UNK
Q61526481
Peach Spring Tuff
UNK
Q61526481
Peach Spring Tuff
UNK
+2^^http://www.w3.org/2001/XMLSchema#decimal
2
NUMBER
+18.78^^http://www.w3.org/2001/XMLSchema#decimal
18.78
NUMBER
+0.02^^http://www.w3.org/2001/XMLSchema#decimal
0.02
NUMBER
+10^^http://www.w3.org/2001/XMLSchema#decimal
10
NUMBER
-140^^http://www.w3.org/2001/XMLSchema#decimal
-140
NUMBER
located in the administrative territorial entity
located in the administrative territorial entity
located in the administrative territorial entity
time period