Sample 90-124

NavDat sample number 57161 · ANDESITE

Sample

Sample ID	90-124
Rock name	ANDESITE
Rock type	VOLCANIC
Composition	INTERMEDIATE
Material	IGNEOUS

Location

Latitude	46.2783
Longitude	-121.867
State / province	Washington

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
19		18	21

Analyses

Whole rock

Item	Value	Std. dev.	Unit	Method
SIO2	61.25		WT%	XRF
TIO2	1.28		WT%	XRF
AL2O3	16.25		WT%	XRF
FEO	7.28		WT%	XRF
MNO	0.18		WT%	XRF
MGO	2.2		WT%	XRF
CAO	5.45		WT%	XRF
NA2O	4.44		WT%	XRF
K2O	1.3		WT%	XRF
P2O5	0.36		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.