ferocious fossil facts
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cast
a model of an organism, formed when sediment fills a mold or hardens
mold
an impression of an organism, formed when sediment hardens around the organism
erosion
as a glacier moves forward,it carries earth materials to new places
sedimentary rock
coal, a fossil fuel, forma when the remains of once living organisms are part of the layered material that hardens
weathering
it can take millions of years for water,wind,and ice to break down rock
fossil
the remains or traces of a plant or animal living long ago.
deposition
wind slows down and drops its load of sediments
