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Sedimentary rocks and Formation. By Vineeth Gaddam, Brandon Hess, Abby Bryan. Warm Up Question. In 3-5 sentences explain how sedimentary rocks are formed? Why size of rocks effects type of sedimentary rock that is made? . Sedimentary Rocks. - PowerPoint PPT Presentation
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SEDIMENTARY ROCKS AND FORMATION
By Vineeth Gaddam, Brandon Hess, Abby Bryan
Warm Up Question In 3-5 sentences explain how
sedimentary rocks are formed? Why size of rocks effects type of sedimentary rock that is made?
Sedimentary Rocks
As you can see in this picture, the sedimentary rocks are bigger towards the surface and then eventually get weathered down to clay particles the farther it goes. The biggest rocks are the sands and gravel, then there are the sands, with the smallest and most weathered rock silts and clays. Through, gradient, discharge, channel and velocity the rivers will go faster and therefore carry more sediments.
How Does a River Help Form Sedimentary Rocks?
In this picture, you can see that the bigger rocks are closer to the surface. As the velocity of the water decreases, then the bigger rocks drop out and are therefore “sorted” by sediment. The waves and currents may then redistribute the sediment over great distances. The energy of motion plays a key part in the formation. As sediments compress together and compact(cementation), as you see in this picture it forms a sedimentary rock. Sedimentary rocks
can be formed in Rivers, floodplains, and reefs.
Procedure For Activity Put a layer of rice krispies at the bottom of your
cup.(this will represent the sand) Put a layer of crushed chocolate wafers in your
cup.(this will represent the mud and silt) Put another layer of rice krispies in your cup. Put a layer of M&M’s/chocolate chips/marsh
mellows in your cup.(this represents the sediments)
Slightly press down to express compression Slowly pour the milk and watch as it penetrates
throughout the cup. DIG IN!
Examples of Sedimentary Rocks
Conglomerate Sandstone
Shale
Conglomerate can be used as building material
Conglomerate is the most porus of the three types of rocks.
The grand Canyon is made up of layers of sedimentary rocks.
Silica and Calcite naturally cements the layers in the sedimentary rocks.
Important Sedimentary Rock facts
Ending Question In 5-8 sentences recall how and where
sedimentary rocks are formed and the types of common sedimentary rocks.
Bibliography Earth Science McDougall/Littell textbook
picture www.sciencebuzz.org for sedimentary
rock picture nicholsclassroom.weebly.com for both
river pictures geology.com for the examples of the
rocks