Sample 90-056

NavDat sample number 57145 · DIORITE

Sample

Sample ID	90-056
Rock name	DIORITE
Rock type	PLUTONIC
Composition	INTERMEDIATE
Material	IGNEOUS

Location

Latitude	46.2921
Longitude	-121.834
State / province	Washington

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
25		18	33

Analyses

Whole rock

Item	Value	Std. dev.	Unit	Method
SIO2	57.4		WT%	XRF
TIO2	1.49		WT%	XRF
AL2O3	16.37		WT%	XRF
FEO	8.78		WT%	XRF
MNO	0.15		WT%	XRF
MGO	3.49		WT%	XRF
CAO	7.16		WT%	XRF
NA2O	3.7		WT%	XRF
K2O	1.17		WT%	XRF
P2O5	0.29		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.