The biotic response to Neoproterozoic snowball earth

Frank A. Corsetti, Alison N. Olcott, Corien Bakermans

Research output: Contribution to journalArticle

79 Scopus citations

Abstract

The commonly held notion among earth scientists that Neoproterozoic low latitude glaciation (ca. 720-585 Ma), sometimes referred to as snowball Earth, caused major extinctions and imparted important evolutionary consequences upon the biosphere is not supported by the microfossil record. In particular, silicified microfossils from pre- and syn-glacial units in the Death Valley region, California, reveal little change during the glacial interval; in fact, the syn-glacial microbiota is slightly more diverse and contains more putative autotrophic and heterotrophic eukaryotes than underlying strata. In Australia, pre- and post-glacial acritarch assemblages from shale reveal no change in diversity across the glacial interval. In modern glacial environments, productive and diverse modern microbial communities live within and upon sea and glacial ice and may provide an analogue for a more robust snowball Earth biosphere than previously considered.

Original languageEnglish (US)
Pages (from-to)114-130
Number of pages17
JournalPalaeogeography, Palaeoclimatology, Palaeoecology
Volume232
Issue number2-4
DOIs
StatePublished - Mar 22 2006

All Science Journal Classification (ASJC) codes

  • Oceanography
  • Ecology, Evolution, Behavior and Systematics
  • Earth-Surface Processes
  • Palaeontology

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