Sample VOL1

NavDat sample number 54639 · TUFF

Sample

Sample ID	VOL1
Rock name	TUFF
Rock type	VOLCANIC
Composition	FELSIC
Material	IGNEOUS
Comment	Volcano, Amador County, California [SE 1/4, SE 1/4, SE 1/4, SE 1/4, Sec. 7 T7N, R12E, along a spur dirt road few 100' northeast of volcano-Fiddletown Road. At drainage divide] Basal moderately welded vitrophyre of lower phase of Nine Hill tuff; phenocryst-poor approx. 5% flattened pumice 1-2 cm long.

Age (Ma)	Error	Min	Max	Geologic age	Dated by
22.78		19.21	26.34

Item	Value	Unit	Method
SIO2	73.92	WT%	XRF
TIO2	0.19	WT%	XRF
AL2O3	13.97	WT%	XRF
FEO	1.22	WT%	XRF
MNO	0.04	WT%	XRF
MGO	-0.38	WT%	XRF
CAO	0.4	WT%	XRF
NA2O	1.74	WT%	XRF
K2O	6.53	WT%	XRF
P2O5	-0.08	WT%	XRF
S	147	PPM	XRF
CL	688	PPM	XRF
ZN	129	PPM	XRF
GA	19	PPM	XRF
RB	227	PPM	XRF
SR	14	PPM	XRF
Y	60	PPM	XRF
ZR	384	PPM	XRF
NB	32	PPM	XRF
CS	-5	PPM	XRF
BA	85	PPM	XRF
PB	55	PPM	XRF
TH	32	PPM	XRF
LA	121	PPM	XRF
CE	146	PPM	XRF
PR	33	PPM	XRF
ND	96	PPM	XRF
SM	17	PPM	XRF