Sample HSP-12

NavDat sample number 29328 · BASALT

Sample

Sample ID	HSP-12
Rock name	BASALT
Rock type	VOLCANIC
Composition	MAFIC
Material	IGNEOUS
Comment	alkali olivine basalt; microporphyritic with microphenos of olivine and plag in fine-grained, subophitic to intersertal matrix of plag, pyroxene, glass, and opaques; erupted from same cinder cone as unit 1; location given is for vent

Latitude	43.509
Longitude	-115.505
Location	Western Snake River Plain
State / province	Idaho
Volcanic field	Boise River Group 2, Smith Praire basalt, unit 2

Age (Ma)	Error	Min	Max	Geologic age	Dated by
0.2		0.05	0.35

Item	Value	Unit	Method
SIO2	47.9	WT%	EPMA
TIO2	2.36	WT%	EPMA
AL2O3	16.3	WT%	EPMA
FEOT	11.62	WT%	EPMA
MNO	0.17	WT%	EPMA
MGO	6.85	WT%	EPMA
CAO	9.77	WT%	EPMA
NA2O	2.87	WT%	EPMA
K2O	1.37	WT%	EPMA
P2O5	0.59	WT%	EPMA
TOTAL	99.86	WT%	EPMA
NB	33	PPM	XRF
ZR	202	PPM	XRF
Y	22	PPM	XRF
SR	466	PPM	XRF
RB	26	PPM	XRF
NI	73	PPM	XRF
CR	154	PPM	XRF
V	227	PPM	XRF
SC	33	PPM	XRF
BA	576	PPM	XRF