Sample 90-087

NavDat sample number 57160 · DIORITE

Sample

Sample ID	90-087
Rock name	DIORITE
Rock type	PLUTONIC
Composition	INTERMEDIATE
Material	IGNEOUS

Location

Latitude	46.3627
Longitude	-121.812
State / province	Washington

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
20		15	25

Analyses

Whole rock

Item	Value	Std. dev.	Unit	Method
SIO2	60.76		WT%	XRF
TIO2	0.89		WT%	XRF
AL2O3	17.37		WT%	XRF
FEO	6.09		WT%	XRF
MNO	0.1		WT%	XRF
MGO	3.62		WT%	XRF
CAO	6.02		WT%	XRF
NA2O	4.65		WT%	XRF
K2O	0.29		WT%	XRF
P2O5	0.2		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.