Sample 90CG-A221A

NavDat sample number 29516 · ANDESITE

Sample

Sample ID	90CG-A221A
Rock name	ANDESITE
Rock type	PLUTONIC
Composition	INTERMEDIATE
Material	IGNEOUS
Comment	sill

Location

Latitude	46.1992
Longitude	-122.381
State / province	Washington

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
36		32.4	39.6

Analyses

Whole rock

Item	Value	Std. dev.	Unit	Method
SIO2	59.73		WT%	XRF
TIO2	0.74		WT%	XRF
AL2O3	16.84		WT%	XRF
FEOT	6.27		WT%	XRF
MNO	0.16		WT%	XRF
MGO	3.94		WT%	XRF
CAO	7.23		WT%	XRF
NA2O	3.45		WT%	XRF
K2O	1.46		WT%	XRF
P2O5	0.18		WT%	XRF
TOTAL	99.58		WT%	XRF
LOI	2.5		WT%	XRF
BA	340		PPM	XRF
LA	38		PPM	XRF
CE	84		PPM	XRF
RB	18		PPM	XRF
SR	410		PPM	XRF
Y	38		PPM	XRF
ZR	300		PPM	XRF
NB	25		PPM	XRF

References

Evarts, Russell C; Ashley, Roger P (1992) Preliminary geologic map of the Elk Mountain Quadrangle, Cowlitz County, Washington. Open-File Report - U. S. Geological Survey. 1992.