Sample RAD-1

NavDat sample number 12148 · BASALT

Sample

Sample ID	RAD-1
Rock name	BASALT
Rock type	VOLCANIC
Composition	MAFIC
Material	IGNEOUS
Comment	Dark gray, moderately coarsely glomeroporphyritic with snowflake-like glomerocrysts of calcic plagioclase up to 15 mm in diameter and small olivine phenocrysts set in diktytaxitic intergranular matrix of augite and plagioclase

Location

Latitude	40.4483
Longitude	-120.455
State / province	California
Volcanic field	Walker Lane

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
4.9		4.4	5.4

Analyses

Whole rock

Item	Value	Std. dev.	Unit	Method
SIO2	49.38		WT%	UNKNOWN
TIO2	1.04		WT%	UNKNOWN
AL2O3	17.69		WT%	UNKNOWN
FEOT	9.31		WT%	UNKNOWN
MNO	0.16		WT%	UNKNOWN
MGO	9.29		WT%	UNKNOWN
CAO	10.69		WT%	UNKNOWN
NA2O	2.85		WT%	UNKNOWN
K2O	0.42		WT%	UNKNOWN
P2O5	0.25		WT%	UNKNOWN

References

Grose, Thomas L T; McKee, Edwin H (1986) Potassium-argon ages of late Miocene to late Quaternary volcanic rocks in the Susanville-Eagle Lake area, Lassen County, California. Isochron/West, vol.45, pp.5-11, Apr 1986