Name: Basalt
Type: rock
Class: Igneous
Subclass: Mafic
Particle Size: Fine
Sample No.: Basalt_H5
Owner: JHU
Wavelength Range: All
Origin: from Kilauea Iki Drill core, via Rosalind Helz, USGS, Reston, VA(Cat. No. KI 79-3-100)
Collection Date: N/A
Description:  Sample from which the powder is derived is gray, medium-grained, slightly vesicular rock with plagioclase laths less than or equal to 3 mm, opaques, and a green phase approx. 1-2 mm in size, set in a grayish groundmass.Particle size was 0-75 micrometers. Original ASTER Spectral Library name was jhu.becknic.rock.igneous.mafic.fine.basal5.spectrum.txt
Composition:

Petrographic Description:  A medium-grained basaltic rock with a subophitic
texture.  Subhedral plagioclase laths are partially enclosed in anhedral
clinopyroxene (augite?).  There are also scattered opaque anhedra and dark
brownish interstitial glass.

Microprobe Analysis:  None.

Chemical Analysis:  (by John Marinenko, USGS, Reston, VA.)
SiO2  51.03
CaO  10.75
TiO2  3.36
Na2O  2.84
Al2O3  14.28
K2O  0.71
Fe2O3  1.74
H2O  0.1
FeO  8.69
P2O5  0.32
MnO  0.16
Cr2O3  0.02
MgO  5.91
TOTAL  99.91
