Transcript Sedimentary Rocks

Sedimentary Rocks
Mr. Cesaire
Martin Van Buren High School
• Aim: What are the processes that form sedimentary Rocks?
• Do now: Take the blue/orange text from the back and define the
following: Sedimentary Rocks, Clastic Rocks
• Test next Friday on minerals, igneous rocks, sedimentary
rocks. STUDY, STUDY, STUDY!
• HW # 4: Read pages 59 to 62 Answer questions 1-8 Due.
• www.myspace.com/mrcesaire - blog, info, etc, updated, Bill Nye
the Science Guy Videos on Rocks.
• www.tinyurl.com/8msdk updated, Bill Nye Science Guy Videos
on Rocks
Sedimentary Rocks
• Who can describe sedimentary rocks?
• Sediments are solid fragments (pieces) of
materials that have been transported then
deposited.
• Transport and deposition by air, water, or
ice.
• Fragments from rocks, fossils, and
animals.
• http://www.sci.ccny.cuny.edu/~mcesaire/
es0604_sediment_deposit.swf <~~(click
here)
• Sedimentary rocks form by three
methods:
• 1. Combination of fragments.
• 2. Evaporation and precipitation
• 3. Biologically
Sedimentary Rocks are
categorized by sediment size.
Pebbles, cobbles, boulders (large grains)~~~>> Conglomerate
Sedimentary Rocks are
categorized by sediment size.
Sand has a grain size of 0.2 to 0.006 cm ~~~>> Sandstone
Sedimentary Rocks are
categorized by sediment size.
Clay has a grain size of less than 0.0004 cm ~~~>> Shale
Sedimentary Rock Formation
• Sediments go through a process of Lithification
• Lithification-conversion of loose sediments into
solid rock.
• 1.Cementation-binding together of sediment with
clay.
• 2. Compaction- sediments “squeezed” together
by water and or sediment pressure.
• 3. Desiccation-drying out or drying up of water.
• In your text, starting on page 127 write down the answer of the
following in your notes.
• Clastic
–
–
–
–
–
1. Describe clastic or clastic sedimentary rocks.
2. How are they typically formed?
3. Describe the various size of fragments.
4. How are these fragments collected and moved?
5. Discuss the process of cementation.
• Chemical
– 1. Where can you find dissolved minerals?
– 2. Describe the process of precipitation and evaporation. Name
some examples.
• Organic
– 1. How do organic sedimentary rocks form?
– 2. What are some examples?
– 3. Name the mineral typically found in limestone
Sedimentary Rock Formation
• Sedimentary rocks tend to form horizontal
layers.
• Also known as strata or beds.
Sedimentary Layers of the shore of
Lake Champlain
http://academics.smcvt.edu/vtgeographic/textbook/geolog
y/Sedimentary_layers.jpg
http://comp.uark.edu/~sboss/seds02.jpg
http://curriculum.calstatela.edu/courses/builders/lessons/less/les2/gifs220/sedgifs/layers38044.jpg
Breccia
Coal
Limestone
Shale
Siltstone