Sample 86-051

NavDat sample number 55915 · RHYOLITE

Sample

Sample ID	86-051
Rock name	RHYOLITE
Rock type	VOLCANIC
Composition	FELSIC
Material	IGNEOUS

Location

Latitude	46.3533
Longitude	-122
State / province	Washington

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
21		20	23

Analyses

Whole Rock

Item	Value	Std. dev.	Unit	Method
SIO2	72.69		WT%	XRF
TIO2	0.63		WT%	XRF
AL2O3	13.82		WT%	XRF
FEO	4.22		WT%	XRF
MNO	0.02		WT%	XRF
MGO	0.27		WT%	XRF
CAO	0.79		WT%	XRF
NA2O	4.31		WT%	XRF
K2O	3.1		WT%	XRF
P2O5	0.14		WT%	XRF

References

Swanson, Donald A (1989) Geologic maps of the French Butte and Greenhorn Buttes quadrangles, Washington. Open-File Report - U. S. Geological Survey. 1989.