Lithology      Rhyolite
Sample#        AP-939-214
Chemistry
SiO2           75.60
Al2O3          12.58
Fe             1.80
CaO            0.10
TiO2           0.10
MnO            0.01
K2O            6.16
MgO            0.13
Na2O           2.70
P2O5           0.03
PPC            0.83
X-Ray Diffraction
               Quartz
               Potassium Feldspar, Plagioclase
               Mica
