Sample PS-64B-20

NavDat sample number 3834 · ANDESITE

Sample

Sample ID	PS-64B-20
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	58.1		WT%	UNKNOWN
AL2O3	16.3		WT%	UNKNOWN
FE2O3	1.8		WT%	UNKNOWN
FEO	1.8		WT%	UNKNOWN
MGO	4.1		WT%	UNKNOWN
CAO	6.5		WT%	UNKNOWN
NA2O	2.2		WT%	UNKNOWN
K2O	3.6		WT%	UNKNOWN
H2O_MINUS	0.22		WT%	UNKNOWN
H2O	1.2		WT%	UNKNOWN
TIO2	0.82		WT%	UNKNOWN
P2O5	0.33		WT%	UNKNOWN
MNO	0.13		WT%	UNKNOWN
CO2	-0.05		WT%	UNKNOWN
TOTAL	100.4		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