investigations

Descent with Modification


SET - B
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 = 1.5cm / 1million years.

Layer 1 began to form 520 million years ago.

  • Layer 1 = 22 cms (oldest)
  • Layer 2 = 28 cms
  • Layer 3 = 27 cms
  • Layer 4 = 37 cms
  • Layer 5 = 25 cms
  • Layer 6 = 38 cms (youngest)

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