Sample 90-067

NavDat sample number 57154 · ANDESITE

Sample

Sample ID	90-067
Rock name	ANDESITE
Rock type	PLUTONIC
Composition	INTERMEDIATE
Material	IGNEOUS

Location

Latitude	46.3618
Longitude	-121.827
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	59.67		WT%	XRF
TIO2	1.51		WT%	XRF
AL2O3	16.67		WT%	XRF
FEO	7.53		WT%	XRF
MNO	0.17		WT%	XRF
MGO	2.32		WT%	XRF
CAO	6.24		WT%	XRF
NA2O	4.22		WT%	XRF
K2O	1.27		WT%	XRF
P2O5	0.4		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.