Lithology      Dacite
Sample#        AP-960-157b
Chemistry
SiO2           64.07
Al2O3          16.46
Fe             4.59
CaO            1.97
TiO2           0.82
MnO            0.03
K2O            0.25
MgO            0.97
Na2O           7.08
P2O5           0.11
PPC            3.65
X-Ray Diffraction
               Plagioclase
               Quartz
               Chlorite
               Mica
