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Principle of Horizontality loading

Sedimentary rocks are laid down horizontally and those that are no longer horizontal have been deformed.

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Basic Students matched to this level have a partial mastery of prerequisite knowledge and skills fundamental for proficient work.
At Grade (Proficient) Students matched to this level have demonstrated competency over challenging subject matter, including subject matter knowledge, application of such knowledge to real-world situations, and analytical skills appropriate to subject matter.
Advanced Students matched to this level are ready for material that requires superior performance and mastery.
  • Read
    Principle of Horizontality

    Principle of Horizontality

    by CK-12 //basic
    Rules for sedimentary rock formation.
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    This indicates how strong in your memory this concept is
  • Video
    Law of Superposition

    Law of Superposition

    by CK-12 //basic
    Explains the law of superposition and the principle of original horizontality. Uses an animation to explain how rock layers can accumulate over time.
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    This indicates how strong in your memory this concept is
  • Downloadable Quiz
    Principle of Horizontality Quiz - MS ES

    Principle of Horizontality Quiz - MS ES

    by CK-12 //basic
    Reviews sedimentary rock formation.
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  • Real World Application
    What Formed This Crater?

    What Formed This Crater?

    by CK-12 //basic
    Evidence that Barringer Crater was formed by a meteorite impact includes high pressure minerals, overturned sedimentary rock layers, rock debris and fragments of the meteorite.
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  • Real World Application
    Nicholas Steno

    Nicholas Steno

    by CK-12 //basic
    Nicholas Steno made many contributions to natural science, particularly to stratigraphy and to the idea of uniformitarianism.
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  • Real World Application
    Geo-Careers: Stratigrapher

    Geo-Careers: Stratigrapher

    by CK-12 //basic
    Stratigraphers study sedimentary rock strata to decipher the geological history of a region or to look for natural resources.
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