Sample 90-024

NavDat sample number 57159 · ANDESITE

Sample

Sample ID	90-024
Rock name	ANDESITE
Rock type	VOLCANIC
Composition	INTERMEDIATE
Material	IGNEOUS

Location

Latitude	46.3282
Longitude	-121.81
State / province	Washington

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
28		24	33

Analyses

Whole rock

Item	Value	Std. dev.	Unit	Method
SIO2	60.66		WT%	XRF
TIO2	1.48		WT%	XRF
AL2O3	16.14		WT%	XRF
FEO	7.56		WT%	XRF
MNO	0.22		WT%	XRF
MGO	2.21		WT%	XRF
CAO	5.83		WT%	XRF
NA2O	4.11		WT%	XRF
K2O	1.31		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.