Sample 86-054

NavDat sample number 55939 · ANDESITE

Sample

Sample ID	86-054
Rock name	ANDESITE
Rock type	VOLCANIC
Composition	INTERMEDIATE
Material	IGNEOUS

Location

Latitude	46.4038
Longitude	-121.91
State / province	Washington

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
27		21	33

Analyses

Whole Rock

Item	Value	Std. dev.	Unit	Method
SIO2	59.34		WT%	XRF
TIO2	1.7		WT%	XRF
AL2O3	15.68		WT%	XRF
FEO	9.06		WT%	XRF
MNO	0.2		WT%	XRF
MGO	2.6		WT%	XRF
CAO	6.5		WT%	XRF
NA2O	3.38		WT%	XRF
K2O	1.21		WT%	XRF
P2O5	0.33		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.