Sample 92-078

NavDat sample number 57517 · RHYOLITE

Sample

Sample ID	92-078
Rock name	RHYOLITE
Rock type	PLUTONIC
Composition	FELSIC
Material	IGNEOUS

Location

Latitude	46.3455
Longitude	-121.74
State / province	Washington

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
18		12	25

Analyses

Whole rock

Item	Value	Std. dev.	Unit	Method
SIO2	75.59		WT%	XRF
TIO2	0.12		WT%	XRF
AL2O3	14.31		WT%	XRF
FEO	1.19		WT%	XRF
MNO	0.06		WT%	XRF
MGO	0.25		WT%	XRF
CAO	1.01		WT%	XRF
NA2O	4.52		WT%	XRF
K2O	2.86		WT%	XRF
P2O5	0.09		WT%	XRF

References

Swanson, Donald A (1994) Geologic map of the East Canyon Ridge Quadrangle, southern Cascade Range, Washington. Open-File Report - U. S. Geological Survey. 1994.