Sample 2

NavDat sample number 12576 · DACITE

Sample

Sample ID	2
Rock name	DACITE
Rock type	VOLCANIC
Composition	FELSIC
Material	IGNEOUS

Location

Latitude	45.796
Longitude	-121.935
State / province	Washington

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
22.7		28	36

Analyses

Whole rock

Item	Value	Std. dev.	Unit	Method
SIO2	67.5		WT%	XRF
TIO2	0.76		WT%	XRF
AL2O3	14.14		WT%	XRF
FEOT	6.63		WT%	XRF
MNO	0.16		WT%	XRF
MGO	1.04		WT%	XRF
CAO	2.88		WT%	XRF
NA2O	4.38		WT%	XRF
K2O	2.29		WT%	XRF
P2O5	0.22		WT%	XRF
TOTAL	99.98		WT%	XRF

References

Berri, Dulcy A; Korosec, Michael A (1983) Geological and geothermal investigation of the lower Wind River valley, southwestern Washington Cascade Range. Open-File Report - Washington (State). Division of Geology and Earth Resources. 83-5; 1983.