Sample 87-146

NavDat sample number 57208 · DACITE

Sample

Sample ID	87-146
Rock name	DACITE
Rock type	VOLCANIC
Composition	FELSIC
Material	IGNEOUS

Location

Latitude	46.3172
Longitude	-121.866
State / province	Washington

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
21		19	23

Analyses

Whole rock

Item	Value	Std. dev.	Unit	Method
SIO2	67.01		WT%	XRF
TIO2	0.78		WT%	XRF
AL2O3	14.95		WT%	XRF
FEO	5.89		WT%	XRF
MNO	0.18		WT%	XRF
MGO	0.93		WT%	XRF
CAO	3.05		WT%	XRF
NA2O	4.95		WT%	XRF
K2O	2		WT%	XRF
P2O5	0.27		WT%	XRF

References

Swanson, Donald A (1992) Geologic map of the McCoy Peak Quadrangle, southern Cascade Range, Washington. Open-File Report - U. S. Geological Survey. 1992.