Sample No Sample Name

NavDat sample number 29607 · RHYOLITE

Sample

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

Location

Latitude	37.7699
Longitude	-118.724
Location	Glass Mountain
State / province	California
Volcanic field	Inyo Craters

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
0		0	0.01	Holocene

Analyses

Glass

Item	Value	Std. dev.	Unit	Method
SIO2	72.88		WT%	UNKNOWN
AL2O3	13.92		WT%	UNKNOWN
FE2O3	0.54		WT%	UNKNOWN
FEO	1.08		WT%	UNKNOWN
MGO	0.17		WT%	UNKNOWN
CAO	0.76		WT%	UNKNOWN
NA2O	4.31		WT%	UNKNOWN
K2O	5.2		WT%	UNKNOWN
H2O_PLUS	0.65		WT%	UNKNOWN
H2O_MINUS	0.07		WT%	UNKNOWN
TIO2	0.15		WT%	UNKNOWN
P2O5	0.02		WT%	UNKNOWN
MNO	0.06		WT%	UNKNOWN

References

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