Sample 91-062

NavDat sample number 57351 · ANDESITE

Sample

Sample ID	91-062
Rock name	ANDESITE
Rock type	VOLCANIC
Composition	INTERMEDIATE
Material	IGNEOUS

Location

Latitude	46.4297
Longitude	-121.737
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	57.26		WT%	XRF
TIO2	1.48		WT%	XRF
AL2O3	17.43		WT%	XRF
FEO	8.63		WT%	XRF
MNO	0.18		WT%	XRF
MGO	3.05		WT%	XRF
CAO	9.77		WT%	XRF
NA2O	0.75		WT%	XRF
K2O	0.91		WT%	XRF
P2O5	0.54		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.