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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
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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
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. Sedimentary Rock Formation
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/geology/Sedimentary_layers.jpg
http://comp.uark.edu/~sboss/seds02.jpg http://curriculum.calstatela.edu/courses/builders/lessons/less/les2/gifs2-20/sedgifs/layers38044.jpg
Breccia Coal Limestone Shale Siltstone