Sample 92-047

NavDat sample number 57509 · DACITE

Sample

Sample ID	92-047
Rock name	DACITE
Rock type	PLUTONIC
Composition	FELSIC
Material	IGNEOUS

Location

Latitude	46.319
Longitude	-121.719
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	69.71		WT%	XRF
TIO2	0.6		WT%	XRF
AL2O3	15.3		WT%	XRF
FEO	4.27		WT%	XRF
MNO	0.12		WT%	XRF
MGO	0.77		WT%	XRF
CAO	1.37		WT%	XRF
NA2O	5.11		WT%	XRF
K2O	2.57		WT%	XRF
P2O5	0.18		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.