Sample 87-170

NavDat sample number 55924 · BASALTIC-ANDESITE

Sample

Sample ID	87-170
Rock name	BASALTIC-ANDESITE
Rock type	VOLCANIC
Composition	INTERMEDIATE
Material	IGNEOUS

Location

Latitude	46.411
Longitude	-121.881
State / province	Washington

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
19		18	21

Analyses

Whole Rock

Item	Value	Std. dev.	Unit	Method
SIO2	55.46		WT%	XRF
TIO2	1.32		WT%	XRF
AL2O3	16.24		WT%	XRF
FEO	9.58		WT%	XRF
MNO	0.16		WT%	XRF
MGO	4.76		WT%	XRF
CAO	8.46		WT%	XRF
NA2O	3.1		WT%	XRF
K2O	0.72		WT%	XRF
P2O5	0.19		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.