[1]Rocks are classified as being either igneous, sedimentary, or
metamorphic. _Igneous_ rocks form by the solidification of molten
material; _sedimentary_ rocks form by the accumulation of sediments
derived from older rocks; and _metamorphic_ rocks form by
recrystallization of older rocks under conditions of high
temperatures and pressures.
[Illustration: MOUNT MANSFIELD STATE FOREST]