Sample H88-20

NavDat sample number 30671

Sample

Sample ID	H88-20
Rock type	VOLCANIC
Material	IGNEOUS

Location

Latitude	29.4167
Longitude	-103.783
Location	Boffecillos Mountains
State / province	TEXAS
Formation	Mule Ears Tuff

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
33.7		30.33	37.07

Analyses

MINERAL

Item	Value	Std. dev.	Unit	Method
PB206_PB204	18.148			TIMS
PB207_PB204	15.556			TIMS
PB208_PB204	37.971			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