Sample 90-062

NavDat sample number 57179 · DACITE

Sample

Sample ID	90-062
Rock name	DACITE
Rock type	VOLCANIC
Composition	FELSIC
Material	IGNEOUS

Location

Latitude	46.2678
Longitude	-121.787
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	63.51		WT%	XRF
TIO2	1.03		WT%	XRF
AL2O3	16.25		WT%	XRF
FEO	6.57		WT%	XRF
MNO	0.16		WT%	XRF
MGO	1.33		WT%	XRF
CAO	3.89		WT%	XRF
NA2O	3.72		WT%	XRF
K2O	3.15		WT%	XRF
P2O5	0.38		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.