Sample 90-093

NavDat sample number 57195 · DACITE

Sample

Sample ID	90-093
Rock name	DACITE
Rock type	VOLCANIC
Composition	FELSIC
Material	IGNEOUS

Location

Latitude	46.2528
Longitude	-121.856
State / province	Washington

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
28		24	33

Analyses

Whole rock

Item	Value	Std. dev.	Unit	Method
SIO2	64.78		WT%	XRF
TIO2	1.02		WT%	XRF
AL2O3	15.01		WT%	XRF
FEO	6.83		WT%	XRF
MNO	0.18		WT%	XRF
MGO	1.41		WT%	XRF
CAO	3.97		WT%	XRF
NA2O	4.47		WT%	XRF
K2O	2		WT%	XRF
P2O5	0.33		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.