Sample 90-075

NavDat sample number 57206 · DACITE

Sample

Sample ID	90-075
Rock name	DACITE
Rock type	VOLCANIC
Composition	FELSIC
Material	IGNEOUS

Location

Latitude	46.3
Longitude	-121.814
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	66.02		WT%	XRF
TIO2	0.84		WT%	XRF
AL2O3	15.77		WT%	XRF
FEO	5.64		WT%	XRF
MNO	0.15		WT%	XRF
MGO	1.3		WT%	XRF
CAO	3.72		WT%	XRF
NA2O	5.11		WT%	XRF
K2O	1.22		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.