Sample CG-18

NavDat sample number 12071 · DACITE

Sample

Sample ID	CG-18
Rock name	DACITE
Rock type	VOLCANIC
Composition	FELSIC
Material	IGNEOUS

Location

Latitude	45.5375
Longitude	-122.217
State / province	_NULL_

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
21		17	25

Analyses

Whole rock

Item	Value	Std. dev.	Unit	Method
SIO2	66.19		WT%	XRF
TIO2	0.88		WT%	XRF
AL2O3	17.01		WT%	XRF
FEOT	4.46		WT%	XRF
MNO	0.22		WT%	XRF
MGO	1.35		WT%	XRF
CAO	2.88		WT%	XRF
NA2O	4.19		WT%	XRF
K2O	2.58		WT%	XRF
P2O5	0.24		WT%	XRF
TOTAL	99.81		WT%	XRF

References

Tolan, Terry Leo (1982) The stratigraphic relationships of the Columbia River Basalt Group in the lower Columbia River Gorge of Oregon and Washington.