Sample 87-094

NavDat sample number 55947 · DACITE

Sample

Sample ID	87-094
Rock name	DACITE
Rock type	VOLCANIC
Composition	FELSIC
Material	IGNEOUS

Location

Latitude	46.4277
Longitude	-121.94
State / province	Washington

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
16		14.4	17.6

Analyses

Whole Rock

Item	Value	Std. dev.	Unit	Method
SIO2	66.14		WT%	XRF
TIO2	1.04		WT%	XRF
AL2O3	14.93		WT%	XRF
FEO	5.69		WT%	XRF
MNO	0.11		WT%	XRF
MGO	1.24		WT%	XRF
CAO	3.94		WT%	XRF
NA2O	4.04		WT%	XRF
K2O	2.59		WT%	XRF
P2O5	0.27		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.