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None of the following fixes a bed's attitude completely except

  • A.its strike alone
  • B.its dip amount alone
  • C.its outcrop width alone
  • D.its strike together with its dip

Answer: D

Correct answer: its strike together with its dip

A plane in space needs two quantities to fix its orientation, and strike and dip are the pair conventionally used. Either alone leaves a whole family of possible attitudes, and outcrop width fixes neither, depending as it does on the thickness and the dip together.

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