Sample s_MA-51

NavDat sample number 33653 · ANDESITE

Sample

Sample ID	s_MA-51
Rock name	ANDESITE
Rock type	VOLCANIC
Composition	INTERMEDIATE
Material	IGNEOUS

Location

Latitude	46.206
Longitude	-121.49
Location	CASCADES / HIGH CASCADES / NORTHWESTERN CASCADES / MOUNT ADAMS / PACIFIC OCEAN
State / province	WASHINGTON
Location comment	SUMMIT

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
0.015		0.0135	0.0165

Analyses

Whole rock

Item	Value	Std. dev.	Unit	Method
K2O	2.464		WT%	AES
AR40	5.23E-14		MOLE/G	MS-ID

References

Hildreth, Wes; Lanphere, Marvin A (1994) Potassium-argon geochronology of a basalt-andesite-dacite arc system; the Mount Adams volcanic field, Cascade Range of southern Washington. Geological Society of America Bulletin. 106; 11, Pages 1413-1429. 1994. doi:10.1130/0016-7606(1994)106<1413:PAGOAB>2.3.CO;2