GEO 101 Lecture 9: Lecture 9 - Sedimentary Rocks

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Emily-Paige Montgomery epmontgomery@crimson.ua.edu
GEO 101-001
Sedimentary Rocks
February 1, 2017
Announcements
First midterm exam is next week, Wednesday 02/08/2017
If necessary, get your testing accommodations setup with ODS today; last minute
accommodations will not be permitted
Dr. Hansen will post a study guide on Blackboard soon; review session on Monday
From Last Time
Started discussing sedimentary rocks: made from pieces or solution of other rocks
Weathering: physical and chemical
Factors affecting weathering rates:
- Surface area
- Rock characteristics
- Climate
Formation of Soil
Important Factors:
- Parent Material
- Time
- Climate
- Humus
- Topography
Steps to make a Sedimentary Rock:
- Weathering
- Transport: erosion and deposition
- Diagenesis and lithification
Review Questions
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Emily-Paige Montgomery epmontgomery@crimson.ua.edu
1. Which chemical weathering process combines oxygen an iron and is important in altering
mafic minerals?
a) Dissolution
b) Oxidation
c) Hydrolysis
d) Carbonation
2. Which type of minerals will weather fastest?
a) Felsic
b) Intermediate
c) Mafic
d) There is no way to tell
3. What is the most influential factor affecting soil formation?
a) Climate
b) Time
c) Topography
d) Parent Material
Sedimentary Environments
Geographic setting where sediment accumulates (deposition)
Continental
- Dominated by river/stream deposition
- Also have glacial and wind (eolian) deposition
Transitional (shoreline)
- Tidal flats
- Lagoons
- Deltas
Marine
- Shallow
- Deep
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