Name: _________________________________________________
Class: _____________
Types of Rocks
Sedimentary
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Sediment is deposited and mixes with water (cement like material)
Compacts due to pressure
Forms layers (strata)
Fossils are mostly found in sedimentary rock because when the organism dies it settles on
land or on the ocean floor and is buried by sediment that forms a fossil in the rock
Igneous
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From the heating and cooling/hardening of magma or lava
Volcanoes
Needs extreme heat to melt into lava or magma
Metamorphic
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Rocks getting buried deep underground and change (morph) due to heat and pressure
Extreme temperature and pressure required
The rocks do not fully melt (but do soften with heat)
Sedimentary
 Sediment is deposited and mixes with water (cement like
material)
 Compacts due to pressure
 Forms layers (strata)
 Fossils are mostly found in sedimentary rock because when the
organism dies it settles on land or on the ocean floor and is
buried by sediment that forms a fossil in the rock
 Weathering and erosion are necessary to form smaller pieces
of rock
Igneous
 From the heating and cooling/hardening of magma or lava
 Volcanoes (magma inside, lava comes out)
 Needs extreme heat to melt into lava or magma
Metamorphic
 Rocks getting buried deep underground and change due to heat
and pressure
 Extreme temperature and pressure required
 The rocks do not fully melt (but do soften with heat)