Sample 70-187

NavDat sample number 5088 · RHYOLITE

Sample

Sample ID	70-187
Rock name	RHYOLITE
Rock type	VOLCANIC
Composition	FELSIC
Material	IGNEOUS

Location

Latitude	29.25
Longitude	-103.3
Location	similar to Burro Mesa Rhyolite, Emory Peak
State / province	Texas

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
29		26	38

Analyses

Whole rock

Item	Value	Std. dev.	Unit	Method
SIO2	75.67		WT%	UNKNOWN
TIO2	0.13		WT%	UNKNOWN
AL2O3	11.44		WT%	UNKNOWN
FE2O3	2.82		WT%	UNKNOWN
MNO	0.03		WT%	UNKNOWN
CAO	0.27		WT%	UNKNOWN
NA2O	5.07		WT%	UNKNOWN
K2O	4.52		WT%	UNKNOWN
P2O5	0.01		WT%	UNKNOWN
TOTAL	99.96		WT%	UNKNOWN
RB	330		PPM	UNKNOWN
SR	4		PPM	UNKNOWN
Y	122		PPM	UNKNOWN
NB	153		PPM	UNKNOWN
TH	48		PPM	UNKNOWN

References

Becker, Susan Ward (1976) Field relations and petrology of the Burro Mesa Riebeckite Rhyolite, Big Bend National Park, Texas.