Sedimentary Rocks (pages 102–106) Sedimentary Rocks (pages 102–106)
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Transcript of Sedimentary Rocks (pages 102–106) Sedimentary Rocks (pages 102–106)
Sedimentary Rocks
(pages 102–106)
1. Describe how sedimentary rocks form.
2. List and describe the three major types of sedimentary rocks.
Objectives
write these down!
• Sediment• Erosion• Deposition• Compaction• Cementation• Clastic rock • Organic rock• Chemical rock
Word wall
How do sedimentary rocks form?
Question 1
Objective 1
Most sedimentary rocks are formed through a series of
processes:
• erosion • deposition• compaction• cementatio
n
Sediment is the particles that make up
sedimentary rock.
Objective 1
Sediment may include pieces of rock, shell, or
bone.
Objective 1
Most sediment comes from erosion.
In erosion, moving water, wind, or ice loosens and carries away pieces of
rock.
Objective 1
When the moving water, wind, or ice slows down, it drops the sediment.
This is called deposition.
Objective 1
Layers of sediment build up over millions of years.
Newer layers press down on older layers.
Objective 1
This squeezes the sediment together.
The squeezing is called compaction.
Objective 1
Let’s compact a piece of bread and see what happens!
Objective 1
Experiment
Water seeps between sediment particles.
Dissolved minerals in the water form
crystals.
Objective 1
The crystals “glue” the sediment
particles together.
This is called cementation.
Objective 1
Rock Cycle
Small, solid pieces of material that come from rocks or living things are called
sediment
?
Circle the letter of the process that loosens and carries away pieces of rock.
a. compactionb. erosionc. deposition
?
List three forces that can carry sediment.
a. _______________
b. _______________
c. _______________
Running waterWind
Ice
1. Fill in the blanks in the flowchart showing the series of processes that forms sedimentary rocks.
Process That Form Sedim entary Rocks
Erosion
a.
Com paction
b.
Deposition
Cementation
?
Objective 2
There are three major groups of sedimentary
rocks:
clastic rocks, organic rocks, and
chemical rocks.
Sedimentary rocks are classified by the kind of sediments they are
made of.
Objective 2
Clastic rock is made of rock particles.
The particles can be tiny or huge.
Objective 2
Sandstone is clastic rock.
Sandstone is made of particles of sand.
Objective 2
Organic rock is made of the remains of
plants and animals.
“Organic” means alive or once living.
Objective 2
Limestone is organic rock.
Limestone is made of bones and shells.
Objective 2
Chemical rock is made of dissolved minerals
that came out of solution and formed
crystals.
Objective 2
Rock salt is chemical rock.
Rock salt forms when a solution evaporates and leaves behind crystals of
halite.
“Natural Crystal Mine – Pakistan”
Objective 2
Kinds of Sedimentary Rock
Kind of Rock Kind of Sediment It Contains
Clastic rock rock particles
a.
remains of plants and animals
b.
mineral crystals from solutions
Organic rock
Chemical rock
?
The kind of sedimentary rock that forms from bones and shells is The kind of sedimentary rock that forms from particles of sand is
sandstone
limestone
?
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