Sample CM

NavDat sample number 30691 · SYENITE

Sample

Sample ID	CM
Rock name	SYENITE
Rock type	VOLCANIC
Composition	INTERMEDIATE
Material	IGNEOUS

Location

Latitude	29.325
Longitude	-103.577
Location	Cigar Mtn; Big Bend and Christmas Mtns
State / province	TEXAS

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
41.3		37.17	45.43

Analyses

MINERAL

Item	Value	Std. dev.	Unit	Method
PB206_PB204	18.784			TIMS
PB207_PB204	15.649			TIMS
PB208_PB204	38.731			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