Sample 87-210

NavDat sample number 22333 · DACITE

Sample

Sample ID	87-210
Rock name	DACITE
Rock type	PLUTONIC
Composition	FELSIC
Material	IGNEOUS

Location

Latitude	46.3975
Longitude	-121.856
State / province	Washington

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
25		18	33

Analyses

Whole rock

Item	Value	Std. dev.	Unit	Method
SIO2	63.89		WT%	XRF
TIO2	1.02		WT%	XRF
AL2O3	15.89		WT%	XRF
FEO	7.84		WT%	XRF
MNO	0.12		WT%	XRF
MGO	0.58		WT%	XRF
CAO	4.07		WT%	XRF
NA2O	4.66		WT%	XRF
K2O	1.55		WT%	XRF
P2O5	0.38		WT%	XRF

References

Swanson, Donald A (1991) Geologic map of the Tower Rock Quadrangle, southern Cascade Range, Washington. Open-File Report - U. S. Geological Survey. 1991.