Geo #4

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  1. Layers of the Earth
    • Litosphere
    • Mantle
    • Core
  2. Lithosphere
    • crust ( contiential & oceanic)
    • Uppermost mantle
  3. Mantle
    • Uppermost mantle
    • Lower mantle
  4. Core
    • outercore
    • inner core
  5. Uppermost Mantle
    • includes astherosphere
    • down to 700km
    • dense ( higher melting point)
    • where peridotite is found (Fe, Mg,O)
  6. Asthenosphere
    • down to 250 km
    • partically melted
    • where earthquakes happen
  7. Lower Mantle
    Spinel
  8. Outercore
    • Molten iron (95%)
    • magnetic field
    • increased pressure
    • increased temperature
  9. Inner core
    • Solid iron
    • Most density
  10. Continental Crust (Rock)
    • granite
    • less dense than oceanic rock
  11. Crust
    • thinnest layer
    • thickness varies ( mountians)
    • oceans = 8km
    • adverage = 45km
  12. Mohorovicic Discontiunity ( Molto)
    • seismic waves reach distant station first
    • waves pass though upper mantle faster
    • seismic velocity is higher in rigid upper mantle
  13. Isostatic Uplift
    • when motion sinks and asthenosphere lifts
    • creates equalibrium with surroundings
  14. Verga
    desert percipitation that never hits the ground
  15. Grand Canyon
    • land rose around river (colorado river)
    • layers laid in marine environments
    • sand, mudstone, limestone,
  16. Igneous
    • melted rock & minerals
    • formed form melted magma
    • granite, basalt, obsidean (glass)
  17. Sedimentary
    • from cemented sediment
    • forms in accumlation of settlement on surfaces
    • sandstone, shale, limestone
  18. Metamorphic
    • rocks changed by pressure, heat, & fluids
    • preexisting rock chemically or physically changed by heat, pressure of fluids
    • Zenoliths
  19. Plutons
    • intrusion of magma into the crust that solidifies into igneous rock
    • heat comes from mantle & radioactivity
    • batholiths
    • dikes
    • sills
    • laccoliths
  20. Igneous Rocks
    • granite
    • basalt
    • obsidean (glass)
  21. Sedimentary Rocks
    • sandstone
    • shale
    • limestone
  22. Metamorphic Rocks
    • slate
    • marble
    • schist
  23. Batholith
    Big
  24. Dike
    slabs
  25. Sills
    flat layer
  26. Laccoliths
    lifts up & bludges surface
  27. Volcanoes are distrubted on the earths surface_______
    • over hot spots
    • mid ocean ridges
    • above subduction zones
  28. Orogenesis
    moiuntian building
  29. Most common element in the earth crust
    Oxygen & Silicon
  30. Granite
    • extrusive rock
    • metamorphic equivalent = gneiss
  31. Igneous Rock
    molten materials that cool and crystallize to forn a solid
  32. Plutons
    large concentrations of magma the intrude and slowly cool in uppper crust
  33. Shields
    most anceint portions of contients that are made of rocks that may been the root of formed mountian ranges
  34. Most common rock in earths crust
    sedimentary
  35. Scientific evidence indicates that the earth has existed w/ it current shape and mass and how long?
    over 4.5 billion yrs
  36. Folding rock strata results form what kind of force
    compressional
  37. Metemorphic rocks produced by heat and or pressure effect
    all types of rocks
  38. Image Upload
  39. Image Upload
    • Strike - slip fault
    • San Andres fault is this type
  40. Image Upload
    • result of crustal tension
    • normal fault
  41. Image Upload
    • result of compressional forces
    • reverse fault
  42. Intrusion of ignerous rock between horizontal layers of pre exsisting country rock
    sill
  43. most common sedimentary rock
    limestone
  44. Most common element in earths crust
    oxygen
  45. Dinosaurs live in this era
    Mesozoic
  46. 88% of earths geologic history
    Pre-Cambrain
  47. Evidence indicates that a meterorite collision cause a massive extinction ended this era
    Mesozoic
  48. Humans lived in this era
    Cenozoic
  49. Fossils appered in this Eon
    Phanarozoic
  50. First fossils of animal teeth, shells, and bones appeared in this era
    Paleozioc
  51. Type of volcano formed in Nor Cal, Oregon, and Washington
    composite
  52. Region of rock added to a contiental margin by tectonic activity
    terrane
  53. Metamorphic equilivalent of sandstone
    quartztie
  54. Lava that cools and forns a rough outer surface
    AA
  55. worlds largest volcano
    shield
  56. Natually occuring solid element or compound
    mineral
  57. Very hot lava
    pahoehoe
  58. Common texture of metaphoric rock
    foiliated
  59. includes ash, scoria, lapilli, pumice, and bombs
    pyroclastics
  60. metamorphic equivalent of limestone
    marble
  61. Hawaiian volcanoes
    shiled
  62. naturally occuring soild assemblage of minerals
    rock
  63. Uniformitarianism
    " the key to the present to the past"
  64. Old crust rock is distroyed and recycled along which type of plate boundary
    convergent
  65. 25% of growth in the western N.A landmass was a result of
    volcanism
  66. Image Upload
Author:
regishouse
ID:
116283
Card Set:
Geo #4
Updated:
2011-12-11 15:14:16
Tags:
geography 100
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Description:
Geography test 100 #4
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