Access

You are not currently logged in.

Access your personal account or get JSTOR access through your library or other institution:

login

Log in to your personal account or through your institution.

If You Use a Screen Reader

This content is available through Read Online (Free) program, which relies on page scans. Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.

Biomat-Related Lifestyles in the Precambrian

Adolf Seilacher
PALAIOS
Vol. 14, No. 1, Theme Issue: Unexplored Microbial Worlds (Feb., 1999), pp. 86-93
DOI: 10.2307/3515363
Stable URL: http://www.jstor.org/stable/3515363
Page Count: 8
  • Read Online (Free)
  • Subscribe ($19.50)
  • Cite this Item
Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Biomat-Related Lifestyles in the Precambrian
Preview not available

Abstract

The strange biota of Neoproterozoic sea bottoms become more understandable if we assume that otherwise soft sediments were sealed by firm and erosion-resistant biomats. This allowed "mat encrusters" (vendobionts; trilobozoan and other sponges) to get attached to sandy bottoms, and molluscan "mat scratchers" to scrape off an algal film, as if they were living on rocks. Minute conical "mat stickers" (Cloudina) probably required a sticky substrate to become stabilized in upright position. Horizontal burrows are interpreted as the works of worm-like "undermat miners." Only the latter lifestyle appears to go back to the Mesoproterozoic; the others emerged in Vendian times and virtually disappeared when matgrounds became restricted to hostile environments in the wake of the Cambrian ecological revolution.

Page Thumbnails

  • Thumbnail: Page 
86
    86
  • Thumbnail: Page 
87
    87
  • Thumbnail: Page 
88
    88
  • Thumbnail: Page 
89
    89
  • Thumbnail: Page 
90
    90
  • Thumbnail: Page 
91
    91
  • Thumbnail: Page 
92
    92
  • Thumbnail: Page 
93
    93