Sample tc89-18a

NavDat sample number 35808 · PYROCLASTIC-FALL

Sample

Age (Ma)	Error	Min	Max	Geologic age	Dated by
11.25		8.6	13.9

Item	Value	Unit	Method
SIO2	73.3	WT%	EPMA
TIO2	0.2	WT%	EPMA
AL2O3	11.5	WT%	EPMA
FE2O3T	1.88	WT%	EPMA
MNO	0.03	WT%	EPMA
MGO	0.06	WT%	EPMA
CAO	0.59	WT%	EPMA
BAO	0.07	WT%	EPMA
NA2O	2.3	WT%	EPMA
K2O	6.2	WT%	EPMA
CL	0.05	WT%	EPMA
F	0.28	WT%	EPMA
H2O	5.3	WT%	EPMA
TOTAL	101.6	WT%	EPMA
BA	506	PPM	XRF
MN	185	PPM	XRF
NB	43	PPM	XRF
RB	197	PPM	XRF
SR	25	PPM	XRF
TI	1180	PPM	XRF
Y	66	PPM	XRF
ZN	56	PPM	XRF
ZR	290	PPM	XRF
LA	85	PPM	XRF
ND	60	PPM	XRF
TH	31	PPM	XRF
CE	160	PPM	XRF