Geology Test-Chpt 6,7,8

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Author:
chasteele
ID:
138860
Filename:
Geology Test-Chpt 6,7,8
Updated:
2012-03-01 01:13:15
Tags:
Geology Time
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Description:
Lecture Test 2
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  1. Father of Geology
    James Hutton
  2. Restated Hutton's idea's as uniformitarianism, which means "the present is the key to the past."
    Charles Lyell
  3. Discomfomity
    Parallel contacts
  4. Angular Uncomformity
  5. Nonconformity
    • Sedimentary deposits on igneous and/or metamorphic rocks
  6. How do Geologist attempt to correlate rock units?
    • Physical Continuity
    • Similiarity of rock types
    • Unique features (e.g volcanic ash bed)
    • Fossils (1) Index fossil (2) Fossil assemblage
  7. Half Life
    Time needed for the number of radioactive isotopes to be reduced by half.
  8. Sediment
    Loose, solid particles of mineral that orginate from (1) weathering and erosion and (2) precipitation
  9. Gravel
    All rounded particles coarser than 2 millimeters in diameter.
  10. Sand
    Grains are from 1/16 millimeter to 2 millimeters in diameter
  11. Silt
    • Grains are from 1/256 millimeter to 1/16
    • Too small to see
  12. Clay
    • Most finest sediment, at less than 1/256 millimeters
    • Too fine to feel gritty in teeth or fingers

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