Sample 87-053

NavDat sample number 55946 · DACITE

Sample

Sample ID	87-053
Rock name	DACITE
Rock type	VOLCANIC
Composition	FELSIC
Material	IGNEOUS

Location

Latitude	46.4497
Longitude	-121.903
State / province	Washington

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
21		19	23

Analyses

Whole Rock

Item	Value	Std. dev.	Unit	Method
SIO2	66.2		WT%	XRF
TIO2	0.98		WT%	XRF
AL2O3	15.68		WT%	XRF
FEO	5.55		WT%	XRF
MNO	0.1		WT%	XRF
MGO	0.77		WT%	XRF
CAO	3.38		WT%	XRF
NA2O	4.92		WT%	XRF
K2O	2.11		WT%	XRF
P2O5	0.31		WT%	XRF

References

Swanson, Donald A (1989) Geologic maps of the French Butte and Greenhorn Buttes quadrangles, Washington. Open-File Report - U. S. Geological Survey. 1989.