How old is the Precambrian Crust?
A) 0-500 million years
B) 500 million-1 billion years
C) 500 million-1.5 billion years
D) 1 billion-4 billion years
Answer: D
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At the time of Pangaea, South America and Africa were attached, forming a continuous landmass. Using Figure 19.2, describe what transpired in the past 225 million years to position the two continents where they are today.
What will be an ideal response?
Davisain theory is usually referred to as the _______.
a - equilibrium theory b - geomorphic cycle c - rejuvenation theory d - idea of concave slopes e - stream development theorem
Erosion of the Taconic Highlands resulted in the development of a(n) ____________________ called
the ____________________. Fill in the blank(s) with the appropriate word(s).
Which of the following is not a very long-lived, radioactive isotope?
A) Rb-87 B) K-40 C) C-14 D) U-238