Matground

An example of what prehistoric microbial matgrounds may have looked like. The wrinkled "elephant skin" texture is seen throughout most Precambrian sediments.

Matgrounds are strong surface layers of seabed-hardening bacterial fauna preserved in the Proterozoic and lower Cambrian. Wrinkled matgrounds are informally named "elephant skin" because of their wrinkled surface in the fossil record. Matgrounds supported themselves until early burrowing worms were ubiquitous enough to unharden them.[1][2][3][4] Burrowing animals broke down the hardy mats to further penetrate the underlying sediment for protection and feeding.[5] Once matgrounds disappeared, exceptional preservation of lagerstätten such as the Burgess Shale or Ediacara Hills also did so.[5] Trace fossils such as Treptichnus are evidence for soft-bodied burrowers more anatomically complex than the Ediacaran biota that also caused the matgrounds' disappearance.[6][7]

See also

References

  1. ^ Ediacaran matground ecology persisted into the earliest Cambrian, by Luis A. Buatois, Guy M. Narbonne, M. Gabriela Mángano, Noelia B. Carmona & Paul Myrow, Nature Communications volume 5, Article number: 3544 (2014), publ. 28 March 2014
  2. ^ Matground Structures and Redox Facies, by Friedrich Pflüger, Palaios 1999, V. 14, 25-39
  3. ^ Ediacaran matground ecology persisted into the earliest Cambrian, Luis A Buatois, Guy M Narbonne, M Gabriela Mángano, Noelia B Carmona, Paul Myrow, Nature Communications, 2014 March 28;5:3544.
  4. ^ Youtube video How Worm Holes Ended Wormworld, by PBS Eons.
  5. ^ a b Seilacher, Adolf; Luis A. Buatoisb; M. Gabriela Mángano (2005-10-07). "Trace fossils in the Ediacaran–Cambrian transition: Behavioral diversification, ecological turnover and environmental shift". Palaeogeography, Palaeoclimatology, Palaeoecology. 227 (4): 323–356. Bibcode:2005PPP...227..323S. doi:10.1016/j.palaeo.2005.06.003.
  6. ^ "Life in the Cambrian". Archived from the original on 2006-02-20. Retrieved 2006-03-09.
  7. ^ Altermann, Wladyslaw (2002) [2002-07-01]. Precambrian Sedimentary Environments. Blackwell Publishing. ISBN 0-632-06415-3.


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