Sample 91PS-U35B

NavDat sample number 59709 · ANDESITE

Sample

Sample ID	91PS-U35B
Rock name	ANDESITE
Rock type	VOLCANIC
Composition	INTERMEDIATE
Material	IGNEOUS

Location

Latitude	46.0831
Longitude	-122.545
State / province	Oregon

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
37		33.3	40.7

Analyses

Whole rock

Item	Value	Std. dev.	Unit	Method
SIO2	59.62		WT%	XRF
TIO2	0.99		WT%	XRF
AL2O3	17.6		WT%	XRF
FEOT	6.16		WT%	XRF
MNO	0.13		WT%	XRF
MGO	3.42		WT%	XRF
CAO	6.64		WT%	XRF
NA2O	4.14		WT%	XRF
K2O	1.05		WT%	XRF
P2O5	0.24		WT%	XRF
TOTAL	99.88		WT%	XRF
LOI	1.29		WT%	XRF
BA	255		PPM	XRF
LA	-30		PPM	XRF
CE	41		PPM	XRF
RB	22		PPM	XRF
SR	450		PPM	XRF
Y	20		PPM	XRF
ZR	190		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.