Sample 93-ER-A120A

NavDat sample number 60020 · ANDESITE

Sample

Sample ID	93-ER-A120A
Rock name	ANDESITE
Rock type	VOLCANIC
Composition	INTERMEDIATE
Material	IGNEOUS

Location

Latitude	46.2961
Longitude	-122.502
State / province	Oregon

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
34		30.6	37.4

Analyses

Whole rock

Item	Value	Std. dev.	Unit	Method
SIO2	62.37		WT%	XRF
TIO2	0.91		WT%	XRF
AL2O3	16.41		WT%	XRF
FEOT	5.82		WT%	XRF
MNO	0.12		WT%	XRF
MGO	3.43		WT%	XRF
CAO	5.61		WT%	XRF
NA2O	3.43		WT%	XRF
K2O	1.68		WT%	XRF
P2O5	0.23		WT%	XRF
TOTAL	99.31		WT%	XRF
LOI	3.61		WT%	XRF
BA	370		PPM	XRF
LA	-30		PPM	XRF
CE	42		PPM	XRF
RB	38		PPM	XRF
SR	510		PPM	XRF
Y	20		PPM	XRF
ZR	200		PPM	XRF
NB	15		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.