New multi-scale perspectives on the stromatolites of Shark Bay, Western Australia

E. P. Suosaari, Pamela R Reid, P. E. Playford, J. S. Foster, J. F. Stolz, G. Casaburi, P. D. Hagan, V. Chirayath, I. G. Macintyre, N. J. Planavsky, Gregor P Eberli

Research output: Contribution to journalArticle

55 Scopus citations

Abstract

A recent field-intensive program in Shark Bay, Western Australia provides new multi-scale perspectives on the world's most extensive modern stromatolite system. Mapping revealed a unique geographic distribution of morphologically distinct stromatolite structures, many of them previously undocumented. These distinctive structures combined with characteristic shelf physiography define eight 'Stromatolite Provinces'. Morphological and molecular studies of microbial mat composition resulted in a revised growth model where coccoid cyanobacteria predominate in mat communities forming lithified discrete stromatolite buildups. This contradicts traditional views that stromatolites with the best lamination in Hamelin Pool are formed by filamentous cyanobacterial mats. Finally, analysis of internal fabrics of stromatolites revealed pervasive precipitation of microcrystalline carbonate (i.e. micrite) in microbial mats forming framework and cement that may be analogous to the micritic microstructures typical of Precambrian stromatolites. These discoveries represent fundamental advances in our knowledge of the Shark Bay microbial system, laying a foundation for detailed studies of stromatolite morphogenesis that will advance our understanding of benthic ecosystems on the early Earth.

Original languageEnglish (US)
Article number20557
JournalScientific Reports
Volume6
DOIs
StatePublished - Feb 3 2016

ASJC Scopus subject areas

  • General

Fingerprint Dive into the research topics of 'New multi-scale perspectives on the stromatolites of Shark Bay, Western Australia'. Together they form a unique fingerprint.

  • Cite this

    Suosaari, E. P., Reid, P. R., Playford, P. E., Foster, J. S., Stolz, J. F., Casaburi, G., Hagan, P. D., Chirayath, V., Macintyre, I. G., Planavsky, N. J., & Eberli, G. P. (2016). New multi-scale perspectives on the stromatolites of Shark Bay, Western Australia. Scientific Reports, 6, [20557]. https://doi.org/10.1038/srep20557