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Sequence of Lesson for Sedimentary Rocks
1.
Preclass video: Students view Sedimentary Rocks and answer related
questions in an online quiz (for example see
https://geosciencevideos.files.wordpress.com/2015/05/sedimentaryrocks_quiz.pdf).
2.
Class begins with a review of learning objectives from video and class
lesson (slide 2).
3.
Students answer a series of multiple choice and short answer questions
(slides 3,4,5) related to video. (Slides 4 and 5 represent two approaches
to the same concept – a conceptual multiple choice question or a Venn
diagram sorting exercise.)
4.
The video deals with the classification of sedimentary rocks. The lecture
adds details about physical and chemical weathering and transportation
processes in clastic sediments. We check on comprehension with a few
conceptest questions (e.g., slides 6,7). We discuss how we can unravel a
sequence of rocks to make interpretation of the geologic history of a
region (foreshadowing a related conversation in the Geologic Time
module).
5.
Class ends with a reflection exercise (slide 8) that can be completed later
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and review of the day’s learning objectives.
LO: I can explain how sedimentary rocks are formed and where they can be found.
Which environment
would be most likely
to produce a rock
like this?
Learning Objectives
Learning Objectives of the Video Sedimentary Rocks
1. I can classify the three major types of sedimentary rocks
and give examples of each.
2. I can explain how sedimentary rocks are formed and where
they can be found.
Learning Objectives of the Related Class Lesson
1. I can describe the differences between physical and
chemical weathering.
2. I can explain how transportation controls the size, shape
and sorting of clastic sediment.
3. I can explain how the characteristics of sedimentary rocks
can be used to interpret ancient environments.
2
LO I can classify the three major types of sedimentary rocks and give examples of each.
What combination of properties best
represents the features of chemical and
biochemical sedimentary rocks as represented
by this Venn diagram?
Chemical
Sed Rocks
A. Lake
B. Stream channel
C. Sand dunes
D. Mountains
Biochemical
Sed Rocks
A. 1 = Salt; 2 = From dead plants; 3 =
Form under shallow marine
conditions
B. 1 = Form due to changing physical
1
2
3
conditions; 2 = From dead
organisms; 3 = Chalk
C. 1 = Salt; 2 = Form by precipitation
from seawater; 3 = From dead
plants
D. 1 = Form by precipitation from
seawater; 2 = Salt; 3 = Chalk
LO: I can classify the three major types of sedimentary rocks and give examples of each.
Chemical
Sedimentary
Rocks
Use the Venn diagram
to compare and
contrast the properties
of chemical and
biochemical
sedimentary rocks.
Place the letters in the
appropriate location on
the diagram. Any
characteristics that are
shared between the rock
types should be placed in
the overlap region.
Biochemical
Sedimentary
Rocks
A
A.
B.
C.
D.
E.
F.
G.
H.
Chalk and coral form from living organisms
Used to interpret geological history
Examples: gypsum; salt
May form under shallow marine conditions
Coal forms from dead plants
Form due to changes in physical conditions
Can form by precipitation from a solution
Limestone is an example
LO: I can describe the differences between physical and chemical weathering.
Which region would exhibit the most rapid
rate of chemical weathering for the same
rock type (e.g., limestone)?
A. A hot, dry state like Arizona
B. A cool, humid state like Oregon
C. A very cold region like Alaska
D. A warm, humid state like North Carolina
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LO: I can explain how transportation controls the size, shape and sorting of clastic sediment.
Reflection Exercise
What does the “sorting” of clastic
sediment represent?
A. Changes in sediment grain shape
B. Changes in sediment grain size
C. Changes in sediment composition
1. Look over your notes and summarize five
features that geologists might use to interpret
something about the environment in which a
sedimentary rock was formed.
2. Answer the following:
a) What was the most interesting thing you learned
today?
b) What remains the most confusing concept?
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