lsu fall final 2013

  1. Refer to this figure.Image Upload 1
    This is a cross-sectional view of an outcrop. What is the correct geologic history?

    C. Deposition of mudstone and sandstone, intrusion of rhyolite dike, deposition of shale and intrusion of basalt dike.
  2. Image Upload 2

    This is a cross-sectional view of an outcrop.
    What is the name for the contact between the shale and sandstone?

    B. Disconformity
  3. Image Upload 3

    This is a cross-sectional view of an outcrop.
    What is the name for the contact between the mudstone and sandstone?

    B. Depositional
  4. Image Upload 4

    This is a cross-sectional view of an outcrop.
    What type of fault is this?

    A. Normal
  5. Image Upload 5
    This is a cross-sectional view of an outcrop.  Which is younger, the basalt layer or the
    A. Basalt layer
    B. Fault
    A. Basalt layer
  6. Image Upload 6

    This is a cross-sectional view of an outcrop. Which side of the fault is the hanging wall?

    C. Left side
  7. A hot body of rock is more likely to exhibit ______ than a cold body of rock.
    A. Ductile behavior
    B. Brittle behavior
    A. Ductile behavior
  8. Earthquakes only occur  ________ the brittle/ductile transition.

    A. Above
  9. A body of rock affected by tensile stress will likely undergo__________.

    A. Stretching
  10. Change in shape, induced by stress, is termed ___________.

    A. Strain
  11. Movement along faults often produces sharply angled rock fragments termed ____________.

    B. Fault breccia
  12. Image Upload 7

    What type of fold is shown in the figure?

    A. Anticline
  13. What do we call the point of maximum curvature of the fold (hint: where the limbs meet)?

    B. Hinge
  14. Image Upload 8
    What is a fold called if the axial plane is vertical (e.g. like the fold in this figure)?

    D. Upright
  15. What stress field will create a strike-slip fault?

    A. Shear
  16. True or false: Rifting can create mountain ranges.
    A. True
    B. False
    A. True
  17. True or false: The orogenic event that created the mountains in the western US is older than the orogenic event that created the mountains in the eastern US.
    A. True
    B. False
    B. False
  18. Which statement best defines the Principle of Uniformitarianism?

    B. Earth processes observed today also operated in the past at about the same rates.
  19. Which statement best defines the Principle of Superposition?

    C.  Layers lower in a stratigraphic column are older than those above.
  20. What does an unconformity in a rock sequence indicate? 

    B.  There is a time gap in the geologic record.
  21. Isotopic dating of sedimentary rocks gives _____________.

    A. A maximum age
  22. What type of boundary creates an orogenic belt that has a fold-and-thrust belt?

    A. Collisional boundary
  23. True or false: Continents are built by accretion of extinct arcs.
    A. True
    B. False
    B. False
  24. The contact between sedimentary rocks and metamorphic rocks is called:

    C.  Nonconformity
  25. Image Upload 9
    What is the oldest unit in this geologic cross section?

    B. Limestone
  26. Image Upload 10

    Which is younger, the basalt dike or the fault?

    C. You cannot tell
  27. Image Upload 11
    If the limestone is 10 Ma and the dike is 8 Ma, how old is the shale?

    C. Between 10 and 8 Ma
  28. True or false: A half-life is the amount of time it takes for half the parent to decay to daughter.
    A. True
    B. False
    A. True
  29. If all of Earth history were compressed into a single year, Homo sapiens would first appear on ________.

    A. December 31, at 11:59 PM
  30. Which of the following is not a geologic deformation?

    D. Dissolution
  31. Earth became internally differentiated, with a metallic core distinct from the rocky mantle, during the _________.

    A. Hadean eon
  32. Banded-iron formations formed in the Proterozoic Eon because of the abundance of iron and _________.

    D.  Oxygen
  33. Oxygen in Earth’s atmosphere was probably derived from ________________.

    C.  Photosynthesis
  34. Where are cratons found on a continent?

    B. Interior
  35. Rodinia and Pangaea
    are supercontinents that assembled during the _______ and __________,

    D.  Proterozoic; Paleozoic
  36. The eon represented by abundant deposits of strata with shelly fossils is the ____________.

    B. Phanerozoic
  37. Dinosaurs first appeared during the ____________ Period.

    D.  Triassic
  38. A fold-thrust belt is _________.

    C. A region of compressed rock located near a convergent continental margin.
  39. The Himalayas and Tibetan Plateau were produced by the collision of __________with southern Asia during the Cenozoic.

    B.  India
  40. The Cretaceous-Tertiary (K-T) boundary event took place how many millions of years ago?

    D. 65
  41. Two atoms of a single element that differ in number of neutrons are said to represent two distinct ________ of that element.

    B. Isotopes
  42. Which proportion of a radioactive isotope is expected to remain in an unaltered (unreacted) state after the passage of 3 half-lives?

    B. One-eighth
  43. Numerical ages for boundaries between time units on the geologic time scale primarily result from the study of __________, in conjunction with relative age data.

    C.  Radiometric dating of igneous rocks
  44. Why do mountains occur in distinctive belts?

    A. Continents are linear features
  45. Which type of fault slopes less than 35 degrees from horizontal and the hanging-wall block moves up relative to the footwall block?

    A. Thrust
  46. If the lithology and fossil content of two bodies of rock on opposite sides of a canyon are identical, we assume these remaining outcrops were likely connected at one time. This idea summarizes the principle of __________.

    C.  Lateral continuity
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lsu fall final 2013
amy fall final exam 3 questions