Sample 87-079

NavDat sample number 57153 · ANDESITE

Sample

Sample ID	87-079
Rock name	ANDESITE
Rock type	VOLCANIC
Composition	INTERMEDIATE
Material	IGNEOUS

Location

Latitude	46.2987
Longitude	-121.871
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	59.1		WT%	XRF
TIO2	1.5		WT%	XRF
AL2O3	16.83		WT%	XRF
FEO	7.95		WT%	XRF
MNO	0.17		WT%	XRF
MGO	2.46		WT%	XRF
CAO	6.01		WT%	XRF
NA2O	4.41		WT%	XRF
K2O	1.09		WT%	XRF
P2O5	0.47		WT%	XRF

References

Swanson, Donald A (1992) Geologic map of the McCoy Peak Quadrangle, southern Cascade Range, Washington. Open-File Report - U. S. Geological Survey. 1992.