Sample 88-049

NavDat sample number 22300 · ANDESITE

Sample

Sample ID	88-049
Rock name	ANDESITE
Rock type	VOLCANIC
Composition	INTERMEDIATE
Material	IGNEOUS

Location

Latitude	46.4683
Longitude	-121.85
State / province	Washington

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
28		24	33

Analyses

Whole rock

Item	Value	Std. dev.	Unit	Method
SIO2	59.68		WT%	XRF
TIO2	1.59		WT%	XRF
AL2O3	15.53		WT%	XRF
FEO	9.12		WT%	XRF
MNO	0.2		WT%	XRF
MGO	2.28		WT%	XRF
CAO	5.85		WT%	XRF
NA2O	4.28		WT%	XRF
K2O	1.14		WT%	XRF
P2O5	0.32		WT%	XRF

References

Swanson, Donald A (1991) Geologic map of the Tower Rock Quadrangle, southern Cascade Range, Washington. Open-File Report - U. S. Geological Survey. 1991.