Sample 87-073

NavDat sample number 57137 · GABBRO

Sample

Sample ID	87-073
Rock name	GABBRO
Rock type	PLUTONIC
Composition	MAFIC
Material	IGNEOUS

Location

Latitude	46.27
Longitude	-121.86
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	51.88		WT%	XRF
TIO2	0.98		WT%	XRF
AL2O3	18.3		WT%	XRF
FEO	9.32		WT%	XRF
MNO	0.16		WT%	XRF
MGO	5.61		WT%	XRF
CAO	10.21		WT%	XRF
NA2O	2.91		WT%	XRF
K2O	0.48		WT%	XRF
P2O5	0.17		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.