Sample 95-002

NavDat sample number 57756 · RHYOLITE

Sample

Sample ID	95-002
Rock name	RHYOLITE
Rock type	VOLCANIC
Composition	FELSIC
Material	IGNEOUS

Location

Latitude	46.6127
Longitude	-121.58
State / province	Washington

Age

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

Analyses

Whole rock

Item	Value	Std. dev.	Unit	Method
SIO2	77.68		WT%	XRF
TIO2	0.2		WT%	XRF
AL2O3	12.48		WT%	XRF
FEO	1.64		WT%	XRF
MNO	0.01		WT%	XRF
MGO	0.15		WT%	XRF
CAO	0.91		WT%	XRF
NA2O	3.31		WT%	XRF
K2O	3.56		WT%	XRF
P2O5	0.04		WT%	XRF

References

Swanson, Donald A (1996) Geologic map of the Packwood Lake Quadrangle, southern Cascade Range, Washington. Open-File Report - U. S. Geological Survey. 1996.