Name:  Arkose

Geologic Name:  Sugarloaf Arkose

Reference:  Emerson, B.K., Geology of Massachusetts and Rhode Island:
U.S. Geol. Survey Bull. 597, p. 93, 1917.

Microscopic characters:  Angular pebbles and grains of quartz, microcline,
microcline-perthite and acid plagioclase are predominant.  The feldspar is
sometimes fresh and sometimes more or less altered to sericite.  Muscovite
flakes and magnetite grains are common.  The cement is both siliceous and
ferruginous.  Some chlorite and secondary calcite are present.