Rocks Powerpoint For Tech With Sound
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Rocks Powerpoint For Tech With Sound Rocks Powerpoint For Tech With Sound Presentation Transcript

  • By Marissa Welch
    EDU 290
    Central Michigan University
    Rocks
  • A Rockis a grouping of one or more minerals
    Three types
    Igneous
    Sedimentary
    Metamorphic
    What is a rock?
  • Rocks are very useful in the environment for things such as:
    cement, gravel, building materials, countertops, tiles, and statues as well as other things like containing ground water and oils/gas
    Helps to discover the history of the Earth’s atmosphere and life on Earth
    Why study Rocks?
    View slide
  • Igneous rocks are formed by cooling and crystallization of magma (below the Earth’s surface) or Lava (above the Earth’s surface)
    There are two types of Igneous rocks
    Intrusivewhich form from magma coming up from the mantle into the crust and cooling
    Extrusivewhich form from volcanic eruptions
    Igneous Rocks
    View slide
  • Examples of Igneous Rocks
    Granite is an example of an Intrusive Igneous Rock
    It forms under the Earths surface from the cooling of magma leaking up from the mantle of Earth
    Intrusive igneous rocks have noticeably large crystals and are usually rough to the touch unless they are polished
    Examples: Kitchen Counters
    The Continental Crust of the Earth is primarily made of Granite
  • Other examples of Intrusive Igneous Rocks:
    Gabbro Andesite Diorite
  • Examples of Extrusive Igneous Rocks
    Basalt is an example of an Extrusive Igneous Rock
    The Oceanic Crust is made primarily of Basalt
    Basalt is formed from lava on the crust of the Earth.
    Because it is formed on the surface, the crystals are very fine-grained
  • Obsidian Rhyolite Scoria
    Other examples of Extrusive Igneous Rocks
  • Sedimentary Rocks
    Sedimentary rocks are formed by the accumulation of sediments.
    Sediments include materials from sand grain size to boulder size
    There are three basic types of sedimentary rocks:
    Clastic (physical weathering)
    Chemical
    Organic
  • Clastic Sedimentary Rocks
    Clastic Sedimentary Rocksare formed from mechanical weathering debris
    Mechanical weathering takes place when rocks are broken down without any change in the chemical nature of the rocks
    breccia, conglomerate, sandstone and shale are some examples
    Breccia
    Conglomerate
    Sandstone
    Shale
  • Chemical Sedimentary Rocks
    Chemical Sedimentary Rocks form when dissolved materials precipitate from solution
    Example : Halite that forms from dried up saltwater lakes
    rock salt (Halite) and some limestone are examples of Chemical Sed. Rocks
    Halite
    Limestone
  • Organic Sedimentary Rocks
    Organic Sedimentary Rocksform from the dead plants and animals and their debris.
    Coal and fossiliferous limestone are examples of organic sed. rock
    An example of fossiliferous limestone has sea shells in it
    Organic material comes from anything living or has lived before
    Fossiliferous Limestone
    Coal
  • Metamorphic Rocks
    Metamorphic rocks have been modified by heat, pressure and chemical process
    usually while buried deep below Earth's surface.
    Exposure to these extreme conditions has altered the minerals, texture and chemical composition of the rocks.
    There are two basic types of metamorphic rocks:
    Non-foliated
    Foliated
  • Foliated Metamorphic Rocks
    Foliated metamorphic rocks: have a layered or banded appearanceknown as a foliation
    Examples are gneiss, phyllite, schist and slate
    produced by exposure to heat and directed pressure
    Gneiss
    Slate
    Schist
  • Non-Foliated Metamorphic Rock
    Non-foliated metamorphic rockssuch as marble and quartzite
    do not have a layered or banded appearance
    Quartzite
    Marble
  • All pictures came from www.gelogy.com
    Information on definitions came from the book used in Gel 100 at Central Michigan University
    Information from slides 9-15 came from www.gelogy.com
    Sedimentary information came from http://geology.com/rocks/sedimentary-rocks.shtml
    Metamorphic information came from http://geology.com/rocks/metamorphic-rocks.shtml
    Work Sited Page