Name: Basalt
Type: rock
Class: Igneous
Subclass: Mafic
Particle Size: Solid
Sample No.: Basalt_7
Owner: JHU
Wavelength Range: All
Origin: from Kilauea, via Rosalind Helz, USGS, Reston, VA (Cat. No. KI75-1-50.8)
Collection Date: N/A
Description: A gray, porphyritic, vuggy or vesicular rock with green phenocrysts ranging in size from < 1 mm to 2 mm and making up < 5% ofthe whole rock. Original ASTER Spectral Library name was jhu.becknic.rock.igneous.mafic.solid.basal7.spectrum.txt
Composition:

Petrographic Description:  A medium- to fine-grained porphyritic rock with 
a felty texture.  Phenocrysts of olivine, some with probable reaction rims, are
set in a groundmass of plagioclase laths, olivine, clinopyroxene (augite?),
opaques, and interstitial glass.

Microprobe Analysis:  None.

Chemical Analysis:  (by John Marinenko, USGS, Reston, VA.)
SiO2  49.52
CaO  10.54
TiO2  3.11
Na2O  2.33
Al2O3  12.91
K2O  0.62
Fe2O3  1.78
H2O  0.19
FeO  9.45
P2O5  0.30
MnO  0.17 
Cr2O3  0.06
MgO  9.07
TOTAL  100.05
