Sample PHA93634

NavDat sample number 43500 · ANDESITE

Sample

Sample ID	PHA93634
Rock name	ANDESITE
Rock type	VOLCANIC
Composition	INTERMEDIATE
Material	IGNEOUS
Comment	Andesite of Horse Mountain

Location

Latitude	44.8742
Longitude	-120.427
State / province	Oregon
Formation	Clarno Formation

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
44.1		42.2	46

Analyses

Whole Rock

Item	Value	Std. dev.	Unit	Method
SIO2	57.85		WT%	XRF
AL2O3	15.95		WT%	XRF
TIO2	0.886		WT%	XRF
FEO	6.82		WT%	XRF
MNO	0.129		WT%	XRF
CAO	7.62		WT%	XRF
MGO	5.42		WT%	XRF
K2O	1.07		WT%	XRF
NA2O	3.7		WT%	XRF
P2O5	0.156		WT%	XRF
TOTAL	99.6		WT%	XRF
NI	71		PPM	XRF
CR	169		PPM	XRF
SC	30		PPM	XRF
V	180		PPM	XRF
BA	276		PPM	XRF
RB	25		PPM	XRF
SR	477		PPM	XRF
ZR	116		PPM	XRF
Y	15		PPM	XRF
NB	6.9		PPM	XRF
GA	19		PPM	XRF
TH	4		PPM	XRF

References

Bestland, E A; Hammond, P E; Blackwell, D L S; Keys, M A; Retallack, GJ; Stimac, J (2002) Geologic framework of the Clarno Unit, John Day Fossil Beds NationalMonument, central Oregon. Open File Report - State of Oregon, Department of Geology and MineralIndustries, Report: O-02-03, 1 disc, 2002