Sample PS-64B-26

NavDat sample number 3843 · ANDESITE

Sample

Sample ID	PS-64B-26
Rock name	ANDESITE
Rock type	VOLCANIC
Composition	INTERMEDIATE
Material	IGNEOUS
Comment	Richmond Mountain Andesite

Location

Latitude	39.4319
Longitude	-115.92
State / province	Nevada

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
34.5		32.1	36.9

Analyses

Whole Rock

Item	Value	Std. dev.	Unit	Method
SIO2	61.6		WT%	UNKNOWN
AL2O3	15.8		WT%	UNKNOWN
FE2O3	1		WT%	UNKNOWN
FEO	1		WT%	UNKNOWN
MGO	3.4		WT%	UNKNOWN
CAO	5.2		WT%	UNKNOWN
NA2O	2.4		WT%	UNKNOWN
K2O	3.3		WT%	UNKNOWN
H2O_MINUS	0.19		WT%	UNKNOWN
H2O	1.6		WT%	UNKNOWN
TIO2	0.78		WT%	UNKNOWN
P2O5	0.25		WT%	UNKNOWN
MNO	0.09		WT%	UNKNOWN
CO2	-0.05		WT%	UNKNOWN
TOTAL	99.91		WT%	UNKNOWN

References

Blake, M C, Jr; McKee, E H; Marvin, R F; Silberman, M L; Nolan, ThomasB (1975) The Oligocene volcanic center at Eureka, Nevada. Journal of Research of the U. S. Geological Survey, vol.3, no.5,pp.605-612, Oct 1975