Sample 93-079

NavDat sample number 36910 · ANDESITE

Sample

Sample ID	93-079
Rock name	ANDESITE
Rock type	VOLCANIC
Composition	INTERMEDIATE
Material	IGNEOUS

Location

Latitude	46.4925
Longitude	-121.502
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	59.99		WT%	XRF
TIO2	1.14		WT%	XRF
AL2O3	16.42		WT%	XRF
FEO	6.89		WT%	XRF
MNO	0.12		WT%	XRF
MGO	3.39		WT%	XRF
CAO	7.64		WT%	XRF
NA2O	2.61		WT%	XRF
K2O	1.51		WT%	XRF
P2O5	0.3		WT%	XRF

References

Swanson, Donald A (1996) Geologic map of the Hamilton Buttes Quadrangle, southern Cascade Range, Washington. Open-File Report - U. S. Geological Survey. 1996.