Sample 85-081

NavDat sample number 57521 · RHYOLITE

Sample

Sample ID	85-081
Rock name	RHYOLITE
Rock type	PLUTONIC
Composition	FELSIC
Material	IGNEOUS

Location

Latitude	46.3228
Longitude	-121.691
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	77.03		WT%	XRF
TIO2	0.17		WT%	XRF
AL2O3	15.38		WT%	XRF
FEO	1.88		WT%	XRF
MNO	0.06		WT%	XRF
MGO	0.1		WT%	XRF
CAO	0.1		WT%	XRF
NA2O	2.16		WT%	XRF
K2O	3.03		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.