Sample 90-037

NavDat sample number 57207 · DACITE

Sample

Sample ID	90-037
Rock name	DACITE
Rock type	PLUTONIC
Composition	FELSIC
Material	IGNEOUS

Location

Latitude	46.2513
Longitude	-121.761
State / province	Washington

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
26		19	33

Analyses

Whole rock

Item	Value	Std. dev.	Unit	Method
SIO2	66.51		WT%	XRF
TIO2	0.66		WT%	XRF
AL2O3	16.63		WT%	XRF
FEO	5.15		WT%	XRF
MNO	0.09		WT%	XRF
MGO	0.53		WT%	XRF
CAO	2.64		WT%	XRF
NA2O	5.02		WT%	XRF
K2O	2.58		WT%	XRF
P2O5	0.19		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.