Sample 90-059

NavDat sample number 57205 · DACITE

Sample

Sample ID	90-059
Rock name	DACITE
Rock type	VOLCANIC
Composition	FELSIC
Material	IGNEOUS

Location

Latitude	46.3038
Longitude	-121.817
State / province	Washington

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
21		20	22

Analyses

Whole rock

Item	Value	Std. dev.	Unit	Method
SIO2	65.95		WT%	XRF
TIO2	0.85		WT%	XRF
AL2O3	15.83		WT%	XRF
FEO	5.65		WT%	XRF
MNO	0.15		WT%	XRF
MGO	1.31		WT%	XRF
CAO	3.89		WT%	XRF
NA2O	4.95		WT%	XRF
K2O	1.17		WT%	XRF
P2O5	0.24		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.