Sample 95-042

NavDat sample number 57754 · RHYOLITE

Sample

Sample ID	95-042
Rock name	RHYOLITE
Rock type	VOLCANIC
Composition	FELSIC
Material	IGNEOUS

Location

Latitude	46.5907
Longitude	-121.548
State / province	Washington

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
27		24	30

Analyses

Whole rock

Item	Value	Std. dev.	Unit	Method
SIO2	71.31		WT%	XRF
TIO2	0.41		WT%	XRF
AL2O3	15.56		WT%	XRF
FEO	3.31		WT%	XRF
MNO	0.09		WT%	XRF
MGO	0.78		WT%	XRF
CAO	0.69		WT%	XRF
NA2O	4.46		WT%	XRF
K2O	3.26		WT%	XRF
P2O5	0.12		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.