Sample 86-147

NavDat sample number 55913 · PYROCLASTIC-FALL

Sample

Sample ID	86-147
Rock name	PYROCLASTIC-FALL
Rock type	VOLCANIC
Composition	FELSIC
Material	IGNEOUS

Location

Latitude	46.358
Longitude	-121.88
State / province	Washington

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
30		24	36

Analyses

Whole Rock

Item	Value	Std. dev.	Unit	Method
SIO2	70.15		WT%	XRF
TIO2	0.79		WT%	XRF
AL2O3	14.48		WT%	XRF
FEO	4.01		WT%	XRF
MNO	0.08		WT%	XRF
MGO	0.59		WT%	XRF
CAO	2.33		WT%	XRF
NA2O	4.85		WT%	XRF
K2O	2.53		WT%	XRF
P2O5	0.18		WT%	XRF

References

Swanson, Donald A (1989) Geologic maps of the French Butte and Greenhorn Buttes quadrangles, Washington. Open-File Report - U. S. Geological Survey. 1989.