Lithology      Rhyolite
Sample#        AP-937-182
Chemistry
SiO2           73.28
Al2O3          14.90
Fe             1.77
CaO            1.44
TiO2           0.11
MnO            0.02
K2O            4.31
MgO            1.01
Na2O           1.04
P2O5           0.03
PPC            2.08
X-Ray Diffraction
               Quartz
               Plagioclase
               Mica

