Transcript Rock Cycle - Whitworth-Buchanan Middle School

The Rock Cycle
Igneous Rock
Forms when hot, liquid rock cools
and solidifies
The time it takes for
magma to cool determines
the texture of the rock
formed.
Sedimentary Rock

forms at or near the Earth’s
surface without the heat or
pressure that are required for
metamorphic or igneous rock

most noticeable feature of
sedimentary rock is its strata
(layers), or stratification

classified by the way it forms.

clastic

chemical

organic
Metamorphic rock
Meta – changed

Contact metamorphism –
occurs near igneous
intrusions

Regional metamorphism –
occurs deep below Earth’s
surface or when large pieces
of Earth’s crust collide

these rocks are found
beneath most continental
rock formations.
morphic - shape
Composition of
Metamorphic Rock
index minerals – form at certain
temperatures and pressures.
Two textures
•
foliated – mineral grains
are arranged in bands,
or planes
non-foliated – NOT arranged
in bands, or planes
Quiz
1.
Igneous rock forms when ______________________.
2.
Describe the rock cycle and give an example of how a rock
could change from one type of rock to another type of rock.