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
