Sample 88-044

NavDat sample number 22318 · ANDESITE

Sample

Sample ID	88-044
Rock name	ANDESITE
Rock type	PLUTONIC
Composition	INTERMEDIATE
Material	IGNEOUS

Location

Latitude	46.4827
Longitude	-121.86
State / province	Washington

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
25		18	33

Analyses

Whole rock

Item	Value	Std. dev.	Unit	Method
SIO2	62.96		WT%	XRF
TIO2	1.05		WT%	XRF
AL2O3	15.82		WT%	XRF
FEO	7.28		WT%	XRF
MNO	0.15		WT%	XRF
MGO	1.74		WT%	XRF
CAO	4.68		WT%	XRF
NA2O	4.46		WT%	XRF
K2O	1.52		WT%	XRF
P2O5	0.34		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.