Sample 87-144

NavDat sample number 57204 · DACITE

Sample

Sample ID	87-144
Rock name	DACITE
Rock type	VOLCANIC
Composition	FELSIC
Material	IGNEOUS

Location

Latitude	46.3173
Longitude	-121.862
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	65.5		WT%	XRF
TIO2	0.87		WT%	XRF
AL2O3	16.45		WT%	XRF
FEO	5.48		WT%	XRF
MNO	0.12		WT%	XRF
MGO	0.57		WT%	XRF
CAO	3.68		WT%	XRF
NA2O	5.17		WT%	XRF
K2O	1.82		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.