Sample 27

NavDat sample number 63218 · PYROCLASTIC-FALL

Sample

Sample ID	27
Alternate ID	N-ASW-66
Rock name	PYROCLASTIC-FALL
Rock type	VOLCANIC
Composition	FELSIC
Material	IGNEOUS
Collected by	A.M. Sarna-Wojcicki
Comment	Thin white ash below the Bailey ash, South Mountain

Age (Ma)	Error	Min	Max	Geologic age	Dated by
1.4		1.26	1.54

Item	Value	Unit	Method
SIO2	76.77	WT%	EPMA
AL2O3	12.87	WT%	EPMA
FE2O3T	0.79	WT%	EPMA
MGO	0.03	WT%	EPMA
MNO	0.05	WT%	EPMA
CAO	0.31	WT%	EPMA
BAO	0	WT%	EPMA
TIO2	0.05	WT%	EPMA
NA2O	3.94	WT%	EPMA
K2O	5.14	WT%	EPMA
CL	0.06	WT%	EPMA
SC	4.47	PPM	NAA
MN	472	PPM	NAA
ZN	54	PPM	NAA
RB	245	PPM	NAA
CS	7.5	PPM	NAA
LA	17.2	PPM	NAA
CE	48.7	PPM	NAA
ND	22	PPM	NAA
SM	5.28	PPM	NAA
EU	0.04	PPM	NAA
TB	0.78	PPM	NAA
DY	5.14	PPM	NAA
YB	3.26	PPM	NAA
LU	0.43	PPM	NAA
HF	4.55	PPM	NAA
TA	3.21	PPM	NAA
TH	18.7	PPM	NAA
U	9.2	PPM	NAA