Sample 89-065

NavDat sample number 22299 · ANDESITE

Sample

Sample ID	89-065
Rock name	ANDESITE
Rock type	PLUTONIC
Composition	INTERMEDIATE
Material	IGNEOUS

Location

Latitude	46.3777
Longitude	-121.785
State / province	Washington

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
20		15	25

Analyses

Whole rock

Item	Value	Std. dev.	Unit	Method
SIO2	59.29		WT%	XRF
TIO2	0.91		WT%	XRF
AL2O3	17.29		WT%	XRF
FEO	6		WT%	XRF
MNO	0.09		WT%	XRF
MGO	4		WT%	XRF
CAO	6.78		WT%	XRF
NA2O	4.28		WT%	XRF
K2O	1.06		WT%	XRF
P2O5	0.3		WT%	XRF

References

Swanson, Donald A (1991) Geologic map of the Tower Rock Quadrangle, southern Cascade Range, Washington. Open-File Report - U. S. Geological Survey. 1991.