Author Question: Which type of ore deposit originated before there was free oxygen in the atmosphere? a. banded iron ... (Read 80 times)

ishan

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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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Answer to Question 1

A

Answer to Question 2

A



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