Sample M357

NavDat sample number 12238 · RHYOLITE

Sample

Sample ID	M357
Rock name	RHYOLITE
Rock type	VOLCANIC
Composition	FELSIC
Material	IGNEOUS
Comment	rhyolite

Location

Latitude	29
Longitude	-104
Location	Santana Tuff, Canon de Lobos
State / province	Texas

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
27.8		26	38

Analyses

Whole rock

Item	Value	Std. dev.	Unit	Method
SIO2	75.71		WT%	XRF
TIO2	0.14		WT%	XRF
AL2O3	12.47		WT%	XRF
FE2O3	0.29		WT%	XRF
FEO	1.47		WT%	XRF
MNO	0.05		WT%	XRF
MGO	0.03		WT%	XRF
CAO	0.88		WT%	XRF
NA2O	4.34		WT%	XRF
K2O	4.6		WT%	XRF
P2O5	0.01		WT%	XRF
TOTAL	100		WT%	XRF
RB	259		PPM	MS-ID
SR	46		PPM	MS-ID
Y	59		PPM	MS-ID
PB	33		PPM	MS-ID
TH	31.3		PPM	MS-ID

References

Cameron, Kenneth L; Cameron, Maryellen (1986) Geochemistry of quartz-normative igneous rocks from the Chinati Mountains and Terlingua areas, West Texas; a comparison with Cenozoic volcanic rocks from Chihuahua and Baja California Sur, Mexico. Guidebook - Bureau of Economic Geology, University of Texas at Austin. 23; Pages 143-163. 1986. .