Sample 85-074

NavDat sample number 57498 · DACITE

Sample

Sample ID	85-074
Rock name	DACITE
Rock type	VOLCANIC
Composition	FELSIC
Material	IGNEOUS

Location

Latitude	46.2733
Longitude	-121.686
State / province	Washington

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
20		15	25

Analyses

Whole rock

Item	Value	Std. dev.	Unit	Method
SIO2	64.98		WT%	XRF
TIO2	1.04		WT%	XRF
AL2O3	15.9		WT%	XRF
FEO	6.17		WT%	XRF
MNO	0.14		WT%	XRF
MGO	1.64		WT%	XRF
CAO	3.9		WT%	XRF
NA2O	4.3		WT%	XRF
K2O	1.61		WT%	XRF
P2O5	0.32		WT%	XRF

References

Swanson, Donald A (1994) Geologic map of the East Canyon Ridge Quadrangle, southern Cascade Range, Washington. Open-File Report - U. S. Geological Survey. 1994.