Sample H89-189

NavDat sample number 30630 · TRACHYTE

Sample

Sample ID	H89-189
Rock name	TRACHYTE
Rock type	VOLCANIC
Composition	INTERMEDIATE
Material	IGNEOUS

Location

Latitude	29.975
Longitude	-104.267
Location	Infiernito Caldera
State / province	TEXAS
Formation	T1

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
37		33.3	40.7

Analyses

MINERAL

Item	Value	Std. dev.	Unit	Method
PB206_PB204	17.897			TIMS
PB207_PB204	15.469			TIMS
PB208_PB204	37.789			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