Lithology      Dacite
Sample#        AP-939-213
Chemistry
SiO2           66.95
Al2O3          17.42
Fe             1.96
CaO            0.10
TiO2           0.13
MnO            0.02
K2O            10.20
MgO            0.84
Na2O           0.43
P2O5           0.04
PPC            1.97
X-Ray Diffraction
               Quartz
               Potassium Feldspar, Plagioclase
               Mica
