Sample UBC-AP-1

NavDat sample number 30689

Sample

Sample ID	UBC-AP-1
Rock type	VOLCANIC
Material	IGNEOUS

Location

Latitude	28.695
Longitude	-103.712
Location	Chihuahua
State / province	CHIHUAHUA
Formation	Upper Palomas tuff

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
29.2		26.28	32.12

Analyses

MINERAL

Item	Value	Std. dev.	Unit	Method
PB206_PB204	18.599			TIMS
PB207_PB204	15.62			TIMS
PB208_PB204	38.558			TIMS

References

James, Eric William; Henry, Christopher D (1993) Southeastern extent of the North American Craton in Texas and northern Chihuahua as revealed by Pb isotopes; with Suppl. Data 9310. Geological Society of America Bulletin, vol.105, no.1, pp.116-126, Jan 1993 doi:10.1130/0016-7606(1993)105<0116:SEOTNA>2.3.CO;2