Sample 86-187

NavDat sample number 55889 · ANDESITE

Sample

Sample ID	86-187
Rock name	ANDESITE
Rock type	VOLCANIC
Composition	INTERMEDIATE
Material	IGNEOUS

Location

Latitude	46.3249
Longitude	-121.915
State / province	Washington

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
26		19	33

Analyses

Whole Rock

Item	Value	Std. dev.	Unit	Method
SIO2	59.78		WT%	XRF
TIO2	1.28		WT%	XRF
AL2O3	17.73		WT%	XRF
FEO	7.26		WT%	XRF
MNO	0.18		WT%	XRF
MGO	1.48		WT%	XRF
CAO	6.64		WT%	XRF
NA2O	4.11		WT%	XRF
K2O	1.28		WT%	XRF
P2O5	0.27		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.