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Understanding the Rock Cycle: Types, Weathering, Erosion, and Fossils

This informative piece explores the rock cycle, detailing the formation, breakdown, and reformation of rocks. It discusses the three main types: igneous, sedimentary, and metamorphic rocks, and explains their unique formation processes. The text delves into weathering, encompassing both chemical and physical processes that decompose rocks, as well as erosion, which describes the movement of material. Additional topics include the geological time scale, the significance of fossils, and the law of superposition, which helps determine the relative ages of rock layers.

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Understanding the Rock Cycle: Types, Weathering, Erosion, and Fossils

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Presentation Transcript

  1. Story in the Rocks By: Riley Fanning, Maria Ezzell, Robbie Himebaugh

  2. Rock Cycle/Types • The Rock Cycle is the formation, breakdown, and reformation of rocks. • The 3 types of rocks include Igneous, Sedimentary, and Metamorphic.

  3. Igneous Rocks • A rock that forms after magma/lava cools.

  4. Metamorphic Rocks • A rock that forms under a lot of pressure and heat.

  5. Sedimentary Rocks • A rock that forms from compacted pieces of sediment.

  6. Weathering • Weathering is two process (chemical and physical) that often work in concert to decompose rocks. • Chemical Weathering – involves a chemical change in at least some of the minerals within a rock. • Physical Weathering – physically breaking rocks into fragments.

  7. Erosion • Erosion is simple movement to a slope due to gravity. (Mass Wasting) • Sheet Erosion – a type of soil erosion on sloping farmland, in which rain washes the top layer of soil off. Sheet Erosion

  8. Geologic Time Scale • The Geologic Time Scale is a chart that shows the eons, eras, epochs, and pivotal events, that happened in that time period.

  9. Fossils • A Fossil is an imprint that shows bones, shells, animals etc. on rocks.

  10. Superposition • The Law of Superposition is the bottom layer of rocks are older than the top layer of rocks.

  11. http://questgarden.com/66/40/8/100215071121/process.htm http://www.nature.nps.gov/geology/usgsnps/misc/gweaero.html http://www.answers.com/topic/sediment http://www.watersheds.org/earth/erosion.htm http://www.answers.com/topic/sheet-erosion http://en.wikipedia.org/wiki/Erosion http://scienceguy288.wordpress.com/2008/01/29/north-america-trip-1-the-grand-canyon/ http://imnh.isu.edu/digitalatlas/geo/basics/diagrams.htm http://www.gsa.org.au/resources/factites/factitesRocks.pdf http://www.fi.edu/fellows/fellow1/rocks/create/igneous.htm http://www.fi.edu/fellows/fellow1/oct98/create/metamorph.htm http://answers.yahoo.com/question/index?qid=20071216203637AAUvTKD http://www.enchantedlearning.com/subjects/Geologictime.html www.google.com/images

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