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Author Question: The major boundary that occurs at a depth of about 30 km below Earth's surface is the:a. ... (Read 64 times)

Jipu 123

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on: Jul 15, 2018

The major boundary that occurs at a depth of about 30 km below Earth's surface is the:a.
   low-velocity zone.
  b. Moho.
  c. inner core-outer core transition.
  d. core-mantle boundary.
  e. none of the above



Question 2

The composition of the mantle is:
  a. peridotite.
  b. basalt.
  c. granite.
  d. iron.
  e. iron and nickel metal



mfedorka

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Reply #1 on: Jul 15, 2018
Answer to Question 1

A

Answer to Question 2

A


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