Transcript Sedimentary Rocks and Fossils File

Sedimentary
Rock Layers
and Fossils
• View an animation and see examples of
sedimentary rocks here: Click
Fault
Near Parhump, Nevada
April, 1978
Overthrust Fault
Arizona
October, 1984
Crossbedded Sandston
Zion National Park, Utah
Grand Canyon #2
Arizona
Small Springs Seeping Through Mauv
Limestone
Grand Canyon National Park
May, 1986
Vasey's Paradise #2
Colorado River
September, 1985
Goosenecks of the San Juan River
Near Mexican Hat, Utah
October, 1983
What is a sedimentary rock?
• Sedimentary rock is formed over
millions of years from the deposition of
sediments in layers. Sediment layers on
top apply pressure to those on bottom,
compacting them into sedimentary
rocks.
Briefly explain how sedimentary rocks are
formed.
http://www.bbc.co.uk/bitesize/ks3/science/
environment_earth_universe/rock_cycle/r
evision/3/
Notes
• Process to form Sedimentary rocks:
sedimentation → compaction → cementation
• Sedimentation- The deposited rocks build up in
layers.
• Compaction- The weight of the sediments on top
squashes the sediments at the bottom.
• Cementation- The crystals form a sort of glue that
sticks or cements the pieces of rock together.
Think about it…
• Why do you think fossils can be found in
Sedimentary rock?
http://www.geology.pitt.edu/GeoSites/site%20AMBRG%201-1new.htm
Fossils
• Fossils are the remains of organic
material / matter that has been buried
and compressed under layers of
sediment.
• Fossils are traces or preserved parts of
organisms that lived in the past.
• Fossils can be used to interpret past
events and environments.
How are fossils formed in sedimentary
rock?
https://www.youtube.com/watch?v=SEDf
Ry6DQns
Stories in Stone
• Create a T-chart in your science journal.
It should be identical to the Fossils or
Not? Chart.
• Complete the card sort with your table
group. Page 319 from your textbook will
help you with this card sort if you get
stuck.
16
Making imprints of objects in clay is most useful for learning about—
A
B
C
D
weathering
fossils
renewable resources
the rock cycle
29 The rock column above shows the layers in a rock formation. The three
diagrams above show the positions of fossils in different rock layers. According
to this information, which fossil is the youngest?
F
G
H
J
BONUS Question!!
Ticket Out The Door!
• On a notecard complete the following:
• On the front of card: explain how
sedimentary rock is formed.
• On back of card: explain the process of
fossil formation.