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Author Question: Which type of ore deposit originated before there was free oxygen in the atmosphere? a. banded iron ... (Read 101 times)

ishan

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on: Jul 15, 2018

Which type of ore deposit originated before there was free oxygen in the atmosphere?
  a. banded iron formation
  b. manganese nodules
  c. colcanogenic copper
  d. gold placer deposits
  e. bauxite



Question 2

What kind of process produces banded iron formations?
  a. sedimentary
  b. hydrothermal
  c. igneous
  d. weathering
  e. metamorphic



Laurenleakan

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

A

Answer to Question 2

A


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