Sample 91-039

NavDat sample number 57368 · DACITE

Sample

Sample ID	91-039
Rock name	DACITE
Rock type	VOLCANIC
Composition	FELSIC
Material	IGNEOUS

Location

Latitude	46.4403
Longitude	-121.731
State / province	Washington

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
28		24	33

Analyses

Whole rock

Item	Value	Std. dev.	Unit	Method
SIO2	63.15		WT%	XRF
TIO2	1.23		WT%	XRF
AL2O3	15.51		WT%	XRF
FEO	7.28		WT%	XRF
MNO	0.16		WT%	XRF
MGO	1.64		WT%	XRF
CAO	3.65		WT%	XRF
NA2O	5.82		WT%	XRF
K2O	1.1		WT%	XRF
P2O5	0.46		WT%	XRF

References

Swanson, Donald A (1993) Geologic map of the Blue Lake Quadrangle, southern Cascade Range, Washington. Open-File Report - U. S. Geological Survey. 1993.