Sample 90-076

NavDat sample number 57201 · DACITE

Sample

Sample ID	90-076
Rock name	DACITE
Rock type	PLUTONIC
Composition	FELSIC
Material	IGNEOUS

Location

Latitude	46.3063
Longitude	-121.8
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	64.97		WT%	XRF
TIO2	0.99		WT%	XRF
AL2O3	15.98		WT%	XRF
FEO	6.45		WT%	XRF
MNO	0.15		WT%	XRF
MGO	1.63		WT%	XRF
CAO	3.25		WT%	XRF
NA2O	4.79		WT%	XRF
K2O	1.53		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.