Geomorphology - Lecture 5

Question 1

During the Early and Middle Mesozoic

Accepted Answer

Sand dunes covered southwest U.S., sand dunes became redbeds in southwest U.S.

Question 2

During the Early and Middle Mesozoic Era, North America grew in land due to

Accepted Answer

collision with volcanic islands, addition of exotic terranes, addition of crustal fragments onto its western part, collision with oceanic plateaus

Question 3

The first true dinosaurs appeared in the

Accepted Answer

end of Triassic Period

Question 4

During the middle Jurassic Period

Accepted Answer

The Rocky mountains submerged under the sea, Sea level rose

Question 5

Earliest ancestors of mammals appeared in the

Accepted Answer

End of Triassic Period

Question 6

During the Early and Middle Mesozoic Era

Accepted Answer

The North Atlantic was shallow, The North Atlantic was salty due to evaporation

Question 7

The Canadian Rockies

Accepted Answer

are remnants of fold-thrust belt, continued to grow 80-40 Ma eastward

Question 8

During the Late mesozoic Era

Accepted Answer

climate was warmer, sea level rose

Question 9

Pangea existed approximately

Accepted Answer

100 Ma

Question 10

Exotic island arcs are crustal fragments added to land

Accepted Answer

by collisions, and formed elsewhere (far away)

Questions 10