Lithology      Rhyolite
Sample#        AP-939-212b
Chemistry
SiO2           79.03
Al2O3          11.60
Fe             1.56
CaO            0.12
TiO2           0.10
MnO            0.01
K2O            1.93
MgO            0.46
Na2O           3.52
P2O5           0.01
PPC            1.66
X-Ray Diffraction
               Quartz
               Plagioclase
               Mica
