Sample 8

NavDat sample number 5457 · TUFF

Sample

Sample ID	8
Rock name	TUFF
Rock type	VOLCANIC
Composition	FELSIC
Material	IGNEOUS

Location

Latitude	24.0333
Longitude	-104.45
Location	Durango City
State / province	Durango
Formation	Registro Tuff

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
31.8		30.7	34

Analyses

Whole Rock

Item	Value	Std. dev.	Unit	Method
SIO2	76.9		WT%	UNKNOWN
TIO2	0.09		WT%	UNKNOWN
AL2O3	11.8		WT%	UNKNOWN
FE2O3	1.23		WT%	UNKNOWN
FEO	0.2		WT%	UNKNOWN
MNO	0.04		WT%	UNKNOWN
MGO	0.07		WT%	UNKNOWN
CAO	0.38		WT%	UNKNOWN
NA2O	3.23		WT%	UNKNOWN
K2O	4.55		WT%	UNKNOWN
H2O_PLUS	0.68		WT%	UNKNOWN
H2O_MINUS	0.13		WT%	UNKNOWN
P2O5	0.05		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