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A geological section differs from a geological map in showing

  • A.the plan distribution of the units
  • B.only the topographic contours
  • C.only the borehole positions
  • D.a vertical slice through the ground

Answer: D

Correct answer: a vertical slice through the ground

A map shows what crops out in plan; a section shows what would be seen in the wall of a trench cut along a chosen line. The two are complementary, and drawing a section is the standard way of testing whether an interpretation of the map is geometrically possible.

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