Sample M48

NavDat sample number 49989

Sample

Sample ID	M48
Rock type	VOLCANIC
Material	IGNEOUS
Comment	FELSIC LAVA

Location

Latitude	28.129
Longitude	-110.876
State / province	SONORA
Formation	VENTANA FELSIC LAVA

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
11.5		10.35	12.65

Analyses

WHOLE ROCK

Item	Value	Std. dev.	Unit	Method
ND143_ND144	0.512679			PER_COM
SR87_SR86	0.705543			PER_COM
PB206_PB204	19.026			MS
PB207_PB204	15.608			MS
PB208_PB204	38.646			MS

References

Housh, Todd B; McDowell, Fred W (2005) Isotope provinces in Laramide and mid-Tertiary igneous rocks of northwestern Mexico (Chihuahua and Sonora) and their relation to basement configuration. Special Paper - Geological Society of America, vol.393, pp.671-692, 2005 doi:10.1130/2005.2393(25)