Sample No Sample Name

NavDat sample number 29611 · RHYOLITE

Sample

Sample ID	No Sample Name
Rock name	RHYOLITE
Rock type	VOLCANIC
Composition	FELSIC
Material	IGNEOUS
Comment	rhyolitic obsidian

Location

Latitude	37.8642
Longitude	-119.007
State / province	California
Volcanic field	Mono Craters
Location comment	circular extrusion by Route 120

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
0.05		0	0.1

Analyses

Glass

Item	Value	Std. dev.	Unit	Method
SIO2	76.09		WT%	UNKNOWN
AL2O3	12.54		WT%	UNKNOWN
FE2O3	0.35		WT%	UNKNOWN
FEO	0.7		WT%	UNKNOWN
MGO	0.02		WT%	UNKNOWN
CAO	0.6		WT%	UNKNOWN
NA2O	4.08		WT%	UNKNOWN
K2O	4.7		WT%	UNKNOWN
H2O_PLUS	0.55		WT%	UNKNOWN
H2O_MINUS	0.16		WT%	UNKNOWN
TIO2	0.07		WT%	UNKNOWN
P2O5	0.008		WT%	UNKNOWN
MNO	0.05		WT%	UNKNOWN

References

Macdonald, Ray; Smith, Robert L; Thomas, John E (1992) U. S. Geological Survey Professional Paper, Report: P 1523, 214 pp., 1992