Sedimentary Rocks

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Transcript Sedimentary Rocks

 Answer the following
questions about the
picture to the right:
 How and where did this
rock cool?
 What minerals might it
be made up of?
 Make sure to explain how
you knew the answers!
What do rocks tell us
about the Earth?
 Small pieces of rock that
are moved and deposited
by water, wind and
gravity
 When sediments come
together they form
sedimentary rocks
•
Deposition
•
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Sediments are deposited
Lithification
•
Physical and chemical processes that
transform sediments into sedimentary
rocks
oCompaction
oWeight of the overlying sediments
forces the sediments closer together
oCementation
oMineral growth “glues” sediment grains
together into a solid rock
 Bedding
 Horizontal
layering of
sedimentary
rocks
 Fossils can be preserved in sedimentary rocks during the
lithification process
 (Organism  Minerals  Rocks)
 Clastic Sedimentary Rocks
 Form from the deposit of
loose sediments that
accumulate on Earths
surface
 Classified by the size of
their particles
 Coarse grained, medium
grained and fine grained
 Chemical Sedimentary Rocks
 Minerals precipitate out
of saturated solutions
and settle to the bottom
 Layers of chemical
sedimentary rocks form,
called evaporites
 Biochemical
Sedimentary Rocks
 Form from the
remains of once
living things
 Limestone comes
from calcium
carbonate which
is used by some
organisms (shells)
1.
2.
3.
4.
5.
6.
How are clastic sediments classified?
What type of clastic sediment has largest particles size?
Smallest?
What size are classified as sand?
What rock type is made up of cobbles?
Classify a sediment that is 0.0020 mm in size.
What type of rock has 0.05 mm sediment size?
1. Name 3 types of sed rocks.
2. How are clastic sed rocks classified?
3. Compare and contrast conglomerate w/
4.
5.
6.
7.
breccia.
How do chem. Sed. Rocks form?
Name 3 common evaporite minerals.
How do organic sed. Rocks form?
Name 2 organic sed rocks.