Sample 92-087

NavDat sample number 57489 · ANDESITE

Sample

Sample ID	92-087
Rock name	ANDESITE
Rock type	VOLCANIC
Composition	INTERMEDIATE
Material	IGNEOUS

Location

Latitude	46.276
Longitude	-121.674
State / province	Washington

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
28		24	33

Analyses

Whole rock

Item	Value	Std. dev.	Unit	Method
SIO2	61.2		WT%	XRF
TIO2	1.02		WT%	XRF
AL2O3	16.29		WT%	XRF
FEO	6.74		WT%	XRF
MNO	0.12		WT%	XRF
MGO	2.94		WT%	XRF
CAO	5.71		WT%	XRF
NA2O	3.82		WT%	XRF
K2O	1.82		WT%	XRF
P2O5	0.34		WT%	XRF

References

Swanson, Donald A (1994) Geologic map of the East Canyon Ridge Quadrangle, southern Cascade Range, Washington. Open-File Report - U. S. Geological Survey. 1994.