Unit M26

image M26-02

large ripples

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Bedding surface showing large ripples in coarse sandstones. The ripples are symmetrical, and have bifurcating (branching) crests.

  • Were these ripples formed by waves or currents?
  • What is the approximate wavelength of the ripples, measured crest-to-crest? (Assume the geologist at front right is 1.8 metres tall)
  • Under what conditions could such large wave ripples form in coarse sediment?

Grid reference: 950 338

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