Sample 5

NavDat sample number 5454 · TUFF

Sample

Sample ID	5
Rock name	TUFF
Rock type	VOLCANIC
Composition	FELSIC
Material	IGNEOUS

Location

Latitude	23.75
Longitude	-105.417
Location	Whal's El Salto
State / province	Durango
Formation	P-1 Tuff

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
23.3		23	23.6

Analyses

Whole Rock

Item	Value	Std. dev.	Unit	Method
SIO2	74.75		WT%	UNKNOWN
TIO2	0.44		WT%	UNKNOWN
AL2O3	13.06		WT%	UNKNOWN
FE2O3	1.7		WT%	UNKNOWN
FEO	0.24		WT%	UNKNOWN
MNO	0.08		WT%	UNKNOWN
MGO	0.15		WT%	UNKNOWN
CAO	1.05		WT%	UNKNOWN
NA2O	3.6		WT%	UNKNOWN
K2O	3.75		WT%	UNKNOWN
H2O_PLUS	0.75		WT%	UNKNOWN
H2O_MINUS	0.53		WT%	UNKNOWN
P2O5	0.03		WT%	UNKNOWN
CO2	0		WT%	UNKNOWN

References

Swanson, E R; Keizer, R P; Lyons, J I; Clabaugh, S E (1978) Tertiary volcanism and caldera development near Durango City, Sierra Madre Occidental, Mexico. Geological Society of America Bulletin, vol.89, no.7, pp.1000-1012, Jul 1978 doi:10.1130/0016-7606(1978)89<1000:TVACDN>2.0.CO;2