Sample 90-048

NavDat sample number 57188

Sample

Sample ID	90-048
Rock type	VOLCANIC
Material	IGNEOUS

Location

Latitude	46.2688
Longitude	-121.818
State / province	Washington

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
21		20	22

Analyses

Whole rock

Item	Value	Std. dev.	Unit	Method
SIO2	64.49		WT%	XRF
TIO2	1.08		WT%	XRF
AL2O3	15.02		WT%	XRF
FEO	6.8		WT%	XRF
MNO	0.14		WT%	XRF
MGO	1.39		WT%	XRF
CAO	3.92		WT%	XRF
NA2O	4.77		WT%	XRF
K2O	2.05		WT%	XRF
P2O5	0.35		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.