Sample 86-142

NavDat sample number 55894 · DACITE

Sample

Sample ID	86-142
Rock name	DACITE
Rock type	VOLCANIC
Composition	FELSIC
Material	IGNEOUS

Location

Latitude	46.3677
Longitude	-121.888
State / province	Washington

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
17		16	18

Analyses

Whole Rock

Item	Value	Std. dev.	Unit	Method
SIO2	62.18		WT%	XRF
TIO2	0.86		WT%	XRF
AL2O3	17.15		WT%	XRF
FEO	6.13		WT%	XRF
MNO	0.14		WT%	XRF
MGO	1.88		WT%	XRF
CAO	5.33		WT%	XRF
NA2O	4.54		WT%	XRF
K2O	1.57		WT%	XRF
P2O5	0.21		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.