Sample 86-082

NavDat sample number 55891 · ANDESITE

Sample

Sample ID	86-082
Rock name	ANDESITE
Rock type	VOLCANIC
Composition	INTERMEDIATE
Material	IGNEOUS

Location

Latitude	46.3073
Longitude	-121.945
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	61.54		WT%	XRF
TIO2	1.55		WT%	XRF
AL2O3	15.16		WT%	XRF
FEO	8.32		WT%	XRF
MNO	0.15		WT%	XRF
MGO	1.88		WT%	XRF
CAO	4.67		WT%	XRF
NA2O	4.46		WT%	XRF
K2O	1.86		WT%	XRF
P2O5	0.42		WT%	XRF

References

Swanson, Donald A (1989) Geologic maps of the French Butte and Greenhorn Buttes quadrangles, Washington. Open-File Report - U. S. Geological Survey. 1989.