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 nuclei for silica precipitation.[1]
OccurrenceEdit
The preservational mode is only present in the Precambrian, and is restricted to shallow or tidal waters.[1] After this point, organisms such as 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]
ConstraintsEdit
Because microbial mats and shallow, supersaturated seas were necessary for the formation of this form of deposit, larger eukaryotic organisms could not survive in the regions in which these deposits were formed; hence the record is mainly restricted to bacteria.[1]
ReferencesEdit
^ abcdefButterfield, Nicholas J. (2003). "Exceptional Fossil Preservation and the Cambrian Explosion". Integrative and Comparative Biology. 43 (1): 166–177. doi:10.1093/icb/43.1.166. PMID 21680421.
This paleontology article is a stub. You can help Wikipedia by expanding it.
bitter, springs, type, preservation, bitter, springs, preservational, mode, preservation, microorganisms, silica, shallow, precambrian, waters, contents, taphonomic, processes, occurrence, constraints, referencestaphonomic, processes, editsilica, emplaced, aro. The Bitter Springs preservational mode is the preservation of microorganisms in silica in shallow Precambrian waters 1 Contents 1 Taphonomic processes 2 Occurrence 3 Constraints 4 ReferencesTaphonomic processes EditSilica 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 nuclei for silica precipitation 1 Occurrence EditThe preservational mode is only present in the Precambrian and is restricted to shallow or tidal waters 1 After this point organisms such as 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 EditBecause microbial mats and shallow supersaturated seas were necessary for the formation of this form of deposit larger eukaryotic organisms could not survive in the regions in which these deposits were formed hence the record is mainly restricted to bacteria 1 References Edit 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 doi 10 1093 icb 43 1 166 PMID 21680421 This paleontology article is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title Bitter Springs type preservation amp oldid 951602971, wikipedia, wiki, book, books, library,
