Sample 84SH-A50

NavDat sample number 59922 · RHYOLITE

Sample

Sample ID	84SH-A50
Rock name	RHYOLITE
Rock type	VOLCANIC
Composition	FELSIC
Material	IGNEOUS

Location

Latitude	46.1706
Longitude	-122.098
State / province	Oregon

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
25		22.5	27.5

Analyses

Whole rock

Item	Value	Std. dev.	Unit	Method
SIO2	72.17		WT%	XRF
TIO2	0.44		WT%	XRF
AL2O3	14.6		WT%	XRF
FEOT	2.76		WT%	XRF
MNO	0.07		WT%	XRF
MGO	0.5		WT%	XRF
CAO	2.61		WT%	XRF
NA2O	3.72		WT%	XRF
K2O	3.05		WT%	XRF
P2O5	0.08		WT%	XRF
TOTAL	99.26		WT%	XRF
LOI	3.15		WT%	XRF
BA	570		PPM	XRF
LA	30		PPM	XRF
CE	68		PPM	XRF
RB	62		PPM	XRF
SR	210		PPM	XRF
Y	56		PPM	XRF
ZR	375		PPM	XRF
NB	16		PPM	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.