Sample 90-036

NavDat sample number 57182 · DACITE

Sample

Sample ID	90-036
Rock name	DACITE
Rock type	VOLCANIC
Composition	FELSIC
Material	IGNEOUS

Location

Latitude	46.2873
Longitude	-121.779
State / province	Washington

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
26		19	33

Analyses

Whole rock

Item	Value	Std. dev.	Unit	Method
SIO2	63.92		WT%	XRF
TIO2	0.96		WT%	XRF
AL2O3	16.29		WT%	XRF
FEO	5.87		WT%	XRF
MNO	0.13		WT%	XRF
MGO	1.43		WT%	XRF
CAO	4.57		WT%	XRF
NA2O	4.73		WT%	XRF
K2O	1.72		WT%	XRF
P2O5	0.37		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.