Sample L231

NavDat sample number 60099 · RHYOLITE

Sample

Sample ID	L231
Rock name	RHYOLITE
Rock type	VOLCANIC
Composition	FELSIC
Material	IGNEOUS

Location

Latitude	45.0279
Longitude	-122.337
State / province	Oregon

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
16		14	19

Analyses

Whole rock

Item	Value	Std. dev.	Unit	Method
SIO2	72.89		WT%	XRF
TIO2	0.36		WT%	XRF
AL2O3	15.68		WT%	XRF
FEOT	2.33		WT%	XRF
MNO	0.05		WT%	XRF
MGO	1.02		WT%	XRF
CAO	2.52		WT%	XRF
NA2O	1.75		WT%	XRF
K2O	3.32		WT%	XRF
P2O5	0.08		WT%	XRF
TOTAL	99.4		WT%	XRF
LOI	5.98		WT%	XRF

References

du, Bray Edward A; John, David A; Sherrod, David R; Evarts, Russell C; Conrey, Richard M; Lexa, Jaroslav (2006) Geochemical database for volcanic rocks of the western Cascades, Washington, Oregon, and California. U. S. Geological Survey Data Series. 2006.