Journal of Earth System Science

, Volume 115, Issue 1, pp 99–112 | Cite as

Chuaria circularis from the early Mesoproterozoic Suket Shale, Vindhyan Supergroup, India: Insights from light and electron microscopy and pyrolysis-gas chromatography

  • Suryendu Dutta
  • Michael Steiner
  • Santanu Banerjee
  • Bernd-Dietrich Erdtmann
  • Silambuchelvan Jeevankumar
  • Ulrich Mann


Chuaria circularis (Walcott 1899) from the Suket Shale of the Vindhyan Supergroup (central India) has been reinvestigated for its morphology and chemical composition using biostatistics, electron microscopy and pyrolysis-gas chromatography. Morphology and microscopic investigations provide little clues on the specific biological affinity ofChuaria as numerous preservational artifacts seem to be incorporated. On the contrary, the predominance of η aliphatic pyrolysates of presently studiedChuaria from India rather supports an algal affinity. Moreover, the reflectance ofC circularis can be used to obtain a comparative maturity parameter of the Precambrian sediments. The review of the age and geographical distribution ofC circularis constrains that this species cannot be considered as an index fossil for the Proterozoic time.


Chuaria circularis Mesoproterozoic Vindhyan Supergroup pyrolysis-gas chromatography 


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© Indian Academy of Sciences 2006

Authors and Affiliations

  • Suryendu Dutta
    • 1
  • Michael Steiner
    • 2
  • Santanu Banerjee
    • 1
  • Bernd-Dietrich Erdtmann
    • 2
  • Silambuchelvan Jeevankumar
    • 1
  • Ulrich Mann
    • 3
  1. 1.Department of Earth SciencesIndian Institute of Technology BombayMumbaiIndia
  2. 2.Technische Universität BerlinBerlinGermany
  3. 3.Sedimentäre SystemeForschungszentrum Jülich, Institut für Chemie und Dynamik der GeosphäreJülichGermany

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