Sample 92-058

NavDat sample number 57474 · ANDESITE

Sample

Sample ID	92-058
Rock name	ANDESITE
Rock type	PLUTONIC
Composition	INTERMEDIATE
Material	IGNEOUS

Location

Latitude	46.2558
Longitude	-121.727
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	57.36		WT%	XRF
TIO2	1.39		WT%	XRF
AL2O3	16.61		WT%	XRF
FEO	8.54		WT%	XRF
MNO	0.14		WT%	XRF
MGO	3.68		WT%	XRF
CAO	6.83		WT%	XRF
NA2O	3.62		WT%	XRF
K2O	1.52		WT%	XRF
P2O5	0.32		WT%	XRF

References

Swanson, Donald A (1994) Geologic map of the East Canyon Ridge Quadrangle, southern Cascade Range, Washington. Open-File Report - U. S. Geological Survey. 1994.