Sample 91-030

NavDat sample number 57369 · DACITE

Sample

Sample ID	91-030
Rock name	DACITE
Rock type	VOLCANIC
Composition	FELSIC
Material	IGNEOUS

Location

Latitude	46.4338
Longitude	-121.662
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	63.57		WT%	XRF
TIO2	1.41		WT%	XRF
AL2O3	14.38		WT%	XRF
FEO	7.83		WT%	XRF
MNO	0.15		WT%	XRF
MGO	1.6		WT%	XRF
CAO	3.25		WT%	XRF
NA2O	4.98		WT%	XRF
K2O	2.42		WT%	XRF
P2O5	0.4		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.