Sample CB11(2)

NavDat sample number 130757 · KERATOPHYRE

Sample

Sample ID	CB11(2)
Rock name	KERATOPHYRE
Rock type	VOLCANIC
Composition	FELSIC
Material	METAMORPHIC
Collected by	Saleeby and others
Comment	Greenschist facies quartz-albite phyric keratophyre tuff

Location

Latitude	39.78
Longitude	-121.07
State / province	California

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
248		223.2	272.8

Analyses

Whole rock

Item	Value	Std. dev.	Unit	Method
PB206_PB204	562			MS
ND143_ND144	0.512174			MS
SR87_SR86	0.705032			MS
U	0.00432		PPM	MS-ID
PB	0.000121		PPM	MS-ID
SR	0.0088		PPM	MS-ID

References

Saleeby, Jason B; Shaw, H F; Niemeyer, S; Moores, E M; Edelman, S H (1989) U/Pb, Sm/Nd and Rb/Sr geochronological and isotopic study of northernSierra Nevada ophiolitic assemblages, California. Contributions to Mineralogy and Petrology, vol.102, no.2, pp.205-220,1989 doi:10.1007/BF00375341