Sample 93-055

NavDat sample number 36911 · ANDESITE

Sample

Sample ID	93-055
Rock name	ANDESITE
Rock type	PLUTONIC
Composition	INTERMEDIATE
Material	IGNEOUS

Location

Latitude	46.4922
Longitude	-121.61
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	61.73		WT%	XRF
TIO2	0.97		WT%	XRF
AL2O3	17.44		WT%	XRF
FEO	6.44		WT%	XRF
MNO	0.13		WT%	XRF
MGO	1.56		WT%	XRF
CAO	5.15		WT%	XRF
NA2O	4.89		WT%	XRF
K2O	1.34		WT%	XRF
P2O5	0.34		WT%	XRF

References

Swanson, Donald A (1996) Geologic map of the Hamilton Buttes Quadrangle, southern Cascade Range, Washington. Open-File Report - U. S. Geological Survey. 1996.