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Which condition best describes North America during the Cambrian? equatorial; rotated ~90o clockwise from present equatorial;...

  1. Which condition best describes North America during the Cambrian?
  1. equatorial; rotated ~90o clockwise from present
  2. equatorial; rotated ~90o counterclockwise from present
  3. polar; rotated ~90o clockwise from present
  4. polar; rotated ~90o counterclockwise from present
  1. Which orogeny represents the first major mountain building event along the east coast of North America during the Paleozoic?
  1. Acadian     b. Appalachian            c. Cordilleran d. Taconic
  1. The Martinsburg Formation represents sediment derived from mountains formed during the _____ Orogeny.
    1. Acadian                 b. Appalachian            c. Cordilleran d. Taconic
  2. Which group of organism represents about 50% of the fossils found in Cambrian rocks?
    1. ammonites             b. brachiopods             c. pelecypods d. trilobites
  3. What modern group of organisms is most likely related to archaeocyathids?
    1. brachiopods           b. cephalopods                        c. corals           d. sponges

Solutions

Expert Solution

  1. Which condition best describes North America during the Cambrian?

ans-polar; rotated ~90o counterclockwise from present

link is here which shows perfectly movement of plates

https://www.youtube.com/watch?v=UwWWuttntio

  1. Which orogeny represents the first major mountain building event along the east coast of North America during the Paleozoic?

Ans-b. Appalachian  

3. The Martinsburg Formation represents sediment derived from mountains formed during the _____ Orogeny.

Ans- b. Appalachian

4. Which group of organism represents about 50% of the fossils found in Cambrian rocks?

Ans-d. trilobites

5.What modern group of organisms is most likely related to archaeocyathids?

Ans-c. corals


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