Sample 92-026

NavDat sample number 57519 · RHYOLITE

Sample

Sample ID	92-026
Rock name	RHYOLITE
Rock type	PLUTONIC
Composition	FELSIC
Material	IGNEOUS

Location

Latitude	46.3605
Longitude	-121.745
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	75.83		WT%	XRF
TIO2	0.13		WT%	XRF
AL2O3	14.61		WT%	XRF
FEO	1.43		WT%	XRF
MNO	0.06		WT%	XRF
MGO	0.25		WT%	XRF
CAO	0.24		WT%	XRF
NA2O	4.9		WT%	XRF
K2O	2.46		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.