Sample 90-090

NavDat sample number 57185 · DACITE

Sample

Sample ID	90-090
Rock name	DACITE
Rock type	VOLCANIC
Composition	FELSIC
Material	IGNEOUS

Location

Latitude	46.3418
Longitude	-121.83
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	64.33		WT%	XRF
TIO2	0.97		WT%	XRF
AL2O3	16.13		WT%	XRF
FEO	5.83		WT%	XRF
MNO	0.11		WT%	XRF
MGO	1.47		WT%	XRF
CAO	4.29		WT%	XRF
NA2O	4.25		WT%	XRF
K2O	2.39		WT%	XRF
P2O5	0.23		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.