Sample 86-119

NavDat sample number 55887 · ANDESITE

Sample

Sample ID	86-119
Rock name	ANDESITE
Rock type	VOLCANIC
Composition	INTERMEDIATE
Material	IGNEOUS

Location

Latitude	46.3288
Longitude	-121.923
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	59.52		WT%	XRF
TIO2	1.25		WT%	XRF
AL2O3	17.47		WT%	XRF
FEO	7.2		WT%	XRF
MNO	0.15		WT%	XRF
MGO	2.21		WT%	XRF
CAO	6.57		WT%	XRF
NA2O	4.16		WT%	XRF
K2O	1.19		WT%	XRF
P2O5	0.26		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.