Sample 90-109

NavDat sample number 57171 · ANDESITE

Sample

Sample ID	90-109
Rock name	ANDESITE
Rock type	VOLCANIC
Composition	INTERMEDIATE
Material	IGNEOUS

Location

Latitude	46.3196
Longitude	-121.752
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	62.97		WT%	XRF
TIO2	0.9		WT%	XRF
AL2O3	15.84		WT%	XRF
FEO	6.25		WT%	XRF
MNO	0.14		WT%	XRF
MGO	1.86		WT%	XRF
CAO	5.01		WT%	XRF
NA2O	3.61		WT%	XRF
K2O	2.52		WT%	XRF
P2O5	0.9		WT%	XRF

References

Swanson, Donald A (1992) Geologic map of the McCoy Peak Quadrangle, southern Cascade Range, Washington. Open-File Report - U. S. Geological Survey. 1992.