Sample 85-001

NavDat sample number 55885 · ANDESITE

Sample

Sample ID	85-001
Rock name	ANDESITE
Rock type	VOLCANIC
Composition	INTERMEDIATE
Material	IGNEOUS

Location

Latitude	46.295
Longitude	-121.918
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	58.28		WT%	XRF
TIO2	1.33		WT%	XRF
AL2O3	20.04		WT%	XRF
FEO	5.06		WT%	XRF
MNO	0.17		WT%	XRF
MGO	1.76		WT%	XRF
CAO	8.81		WT%	XRF
NA2O	3.37		WT%	XRF
K2O	0.98		WT%	XRF
P2O5	0.21		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.