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ThePhysicist

Many planty mudstone pebbles show laminations (fine layers) and cleave in planes, indicating they preserve the original sedimentation undisturbed by river action. The foremost portion of the left piece may preserve a seed.

From the album:

Hell Creek Formation Microsite

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Photo Information

  • Taken with Apple iPhone SE (2nd generation)
  • Focal Length 4 mm
  • Exposure Time 1/120
  • f Aperture f/1.8
  • ISO Speed 32

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