investigations

Descent with Modification


SET - A
Layers Types
b Layer 6 b
b Layer 5 b
b Layer 4 b
b Layer 3 b
b Layer 2 b
b Layer 1 b
Types
bar

Notes

 Rate of sedimentation = 1cm / 1million years.

Layer 1 began to form 570 million years ago.

    Depth of layers:
  • Layer 1 = 14 cms (oldest)
  • Layer 2 = 18 cms
  • Layer 3 = 47 cms
  • Layer 4 = 17 cms
  • Layer 5 = 22 cms
  • Layer 6 = 37 cms (youngest)

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Science at a Distance
© 1998, 1999, 2000 Professor John Blamire