Sample BR-28A

NavDat sample number 55404 · ANDESITE

Sample

Sample ID	BR-28A
Rock name	ANDESITE
Rock type	PLUTONIC
Composition	INTERMEDIATE
Material	IGNEOUS

Location

Latitude	44.17
Longitude	-122.244
State / province	Oregon

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
22		11	33

Analyses

Whole rock

Item	Value	Std. dev.	Unit	Method
SIO2	57.43		WT%	XRF
TIO2	1.07		WT%	XRF
AL2O3	18.37		WT%	XRF
FEOT	6.58		WT%	XRF
MNO	0.13		WT%	XRF
MGO	3.39		WT%	XRF
CAO	8.58		WT%	XRF
NA2O	3.38		WT%	XRF
K2O	0.86		WT%	XRF
P2O5	0.22		WT%	XRF
TOTAL	98.88		WT%	XRF
LOI	3.47		WT%	XRF

References

Priest, George R; Black, Gerald L; Woller, Neil M; Taylor, Edward M (1988) Geologic map of the McKenzie Bridge Quadrangle, Lane County, Oregon. Geological Map Series (Portland). 48; 1988.