Sample 87-063

NavDat sample number 55923 · BASALTIC-ANDESITE

Sample

Sample ID	87-063
Rock name	BASALTIC-ANDESITE
Rock type	VOLCANIC
Composition	INTERMEDIATE
Material	IGNEOUS

Location

Latitude	46.4755
Longitude	-121.968
State / province	Washington

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
23		20.7	25.3

Analyses

Whole Rock

Item	Value	Std. dev.	Unit	Method
SIO2	54.87		WT%	XRF
TIO2	1.17		WT%	XRF
AL2O3	18.83		WT%	XRF
FEO	7.77		WT%	XRF
MNO	0.16		WT%	XRF
MGO	4.2		WT%	XRF
CAO	8.43		WT%	XRF
NA2O	3.69		WT%	XRF
K2O	0.66		WT%	XRF
P2O5	0.23		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.