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Bitter Springs type preservation

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Title: Bitter Springs type preservation  
Author: World Heritage Encyclopedia
Language: English
Subject: Doushantuo type preservation, Beecher's Trilobite type preservation, Beecher's Trilobite Bed, Burgess Shale type preservation, Cambrian
Collection: Fossilization, Precambrian Fossils, Proterozoic Fossil Record, Taphonomy
Publisher: World Heritage Encyclopedia
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Bitter Springs type preservation

The Bitter Springs preservational mode is the preservation of microorganisms in silica, in shallow Precambrian waters.[1]

Contents

  • Taphonomic processes 1
  • Occurrence 2
  • Constraints 3
  • References 4

Taphonomic processes

Silica is emplaced around the organisms very rapidly, before their cells can even collapse; the strong silica is able to withstand great pressures and preserves three-dimensional detail even after metamorphosis.[1] Microbial mats, as they decayed, acted as nucleii for silica precipitation.[1]

Occurrence

The preservational mode is only present in the sponges extracted silica from the oceans in order to construct tests (skeletons), with the result that the surface oceans no longer became supersaturated with respect to silica when evaporation condensed the mineral.[1]

Constraints

Because microbial mats and shallow, supersaturated seas were necessary for the formation of this form of deposit, larger


  1. ^ a b c d e f Butterfield, Nicholas J. (2003). "Exceptional Fossil Preservation and the Cambrian Explosion". Integrative and Comparative Biology 43 (1): 166–177.  

References

[1]

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