Sedimentary Rocks
By:Mathew Alcantara
https://upload.wikimedia.org/wikipedia/commons/b/ba/Striated_fault_plane_in_sedimentary_
rock.JPG
What are Sedimentary rocks?
Sedimentary rocks
-2nd great rock class
-mostly underwater
-consist of layers of strata
(Strata)
http://justinsilver.com/wp-content/uploads/2012/10/Volcanic-Strata.jpg
Types of Sedimentary rock
Clastic
-made of mechanical weathering debris(Clasts)
-most common
-may contain shells and stones
Breccia
Conglomerate
http://geology.com/rocks/pictures/breccia.jpg
Types of Sedimentary rocks
Chemical
-when dissolved materials are separated from the solution
Iron ore
Rock salt
http://geology.com/rocks/pictures/hematite.jpg
http://geology.com/rocks/pictures/halite.jpg
Types of Sedimentary rocks
Organic
-made of remains of living organisms
-plants
-microscopic shells
(Coal)
(Limestone)
http://geology.com/rocks/pictures/coal-anthracite.jpg
http://geology.com/rocks/pictures/limestone.jpg
How are they formed?
Weathering
-Breaking of rocks into smaller pieces or sediments
Deposition
-The transportation of sediments
Erosion
-the combination of weathering and movement of the resulting sediments
Lithification
-the process of changing of sediments into rock
-compaction
-cementation
How are they formed?
Compaction
-The process of turning sediments into rock via pressure
Cementation
-Minerals act as glue binding sediments together
How are they classified?
Clastic
-the size of the sediments
Chemical/Organic
-chemical composition
https://fitz6.files.wordpress.com/2012/05/rockcycle.jpg
Clastic classification
https://upload.wikimedia.org/wikipedia/commons/7/76/Sedimentary_Rock_Chart.png
Chemical/Organic classification
CaCO3
(Calcium carbonate)
SiO2 Silicon dioxide
CaH4O6S
NaCl
https://upload.wikimedia.org/wikipedia/commons/7/76/Sedimentary_Rock_Chart.png
The role of sedimentary rocks in the
carbon cycle
Thank you for watching
• http://geology.com/rocks/sedimentary-rocks.shtml
• http://geology.about.com/od/more_sedrocks/a/aboutsandsto
ne.htm
• http://www.rocksandminerals4u.com/sedimentary_rock_for
mation.html
• https://www.gypsum.org/about/gypsum-101/what-isgypsum/
• http://geology.com/rocks/chert.shtml
• http://earthobservatory.nasa.gov/Features/CarbonCycle/page
2.php