Lithology      Rhyolite
Sample#        AP-938-93
Chemistry
SiO2           78.14
Al2O3          11.66
Fe             1.88
CaO            0.12
TiO2           0.14
MnO            0.01
K2O            2.30
MgO            0.84
Na2O           2.87
P2O5           0.01
PPC            2.04
X-Ray Diffraction
               Quartz
               Plagioclase
               Mica
               Smectite
