Sample 93-027

NavDat sample number 36899 · BASALTIC-ANDESITE

Sample

Sample ID	93-027
Rock name	BASALTIC-ANDESITE
Rock type	PLUTONIC
Composition	INTERMEDIATE
Material	IGNEOUS

Location

Latitude	46.3942
Longitude	-121.59
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	55.91		WT%	XRF
TIO2	1.31		WT%	XRF
AL2O3	17.98		WT%	XRF
FEO	7.85		WT%	XRF
MNO	0.25		WT%	XRF
MGO	4.2		WT%	XRF
CAO	6.55		WT%	XRF
NA2O	4.39		WT%	XRF
K2O	1.3		WT%	XRF
P2O5	0.25		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.