Sample M38

NavDat sample number 49988

Sample

Sample ID	M38
Rock type	VOLCANIC
Material	IGNEOUS
Comment	FELSIC LAVA

Location

Latitude	28.0333
Longitude	-110.82
State / province	SONORA
Formation	VENTANA FELSIC LAVA

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
12.2		10.98	13.42

Analyses

WHOLE ROCK

Item	Value	Std. dev.	Unit	Method
ND143_ND144	0.512663			PER_COM
SR87_SR86	0.705468			PER_COM
PB206_PB204	18.975			MS
PB207_PB204	15.626			MS
PB208_PB204	38.696			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)