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Mark the correct order of stages from older to younger during the Holocene period :

  • A.Boreal-Pre-Boreal-Subboreal
  • B.Subatlantic-Atlantic-Subboreal
  • C.Boreal-Atlantic-Subboreal
  • D.Subatlantic-Subboreal-Preatlantic

Answer: C

The correct older-to-younger order is Boreal-Atlantic-Subboreal.

The Blytt-Sernander scheme divides the Holocene of north-west Europe into: Preboreal (about 11,700-10,500 years ago), Boreal, Atlantic (the warm, moist climatic optimum), Subboreal and Subatlantic (the last 2,500 years or so).

The first option puts Boreal before Preboreal, and the second and fourth run from younger to older, starting with the Subatlantic; the fourth also uses 'Preatlantic', which is not a stage in the scheme.

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