Controls on Development and Diversity of Early Archean Stromatolites

DSpace/Manakin Repository

Controls on Development and Diversity of Early Archean Stromatolites

Citable link to this page

. . . . . .

Title: Controls on Development and Diversity of Early Archean Stromatolites
Author: Allwood, Abigail C.; Grotzinger, John P.; Knoll, Andrew Herbert; Burch, Ian W.; Anderson, Mark S.; Coleman, Max L.; Kanik, Isik

Note: Order does not necessarily reflect citation order of authors.

Citation: Allwood, Abigail C., John P. Grotzinger, Andrew Herbert Knoll, Ian W. Burch, Mark S. Anderson, Max L. Coleman, and Isik Kanik. 2009. Controls on development and diversity of early Archean stromatolites. PNAS 106(24): 9548-9555.
Full Text & Related Files:
Abstract: The ≈3,450-million-year-old Strelley Pool Formation in Western Australia contains a reef-like assembly of laminated sedimentary accretion structures (stromatolites) that have macroscale characteristics suggestive of biological influence. However, direct microscale evidence of biology—namely, organic microbial remains or biosedimentary fabrics—has to date eluded discovery in the extensively-recrystallized rocks. Recently-identified outcrops with relatively good textural preservation record microscale evidence of primary sedimentary processes, including some that indicate probable microbial mat formation. Furthermore, we find relict fabrics and organic layers that covary with stromatolite morphology, linking morphologic diversity to changes in sedimentation, seafloor mineral precipitation, and inferred microbial mat development. Thus, the most direct and compelling signatures of life in the Strelley Pool Formation are those observed at the microscopic scale. By examining spatiotemporal changes in microscale characteristics it is possible not only to recognize the presence of probable microbial mats during stromatolite development, but also to infer aspects of the biological inputs to stromatolite morphogenesis. The persistence of an inferred biological signal through changing environmental circumstances and stromatolite types indicates that benthic microbial populations adapted to shifting environmental conditions in early oceans.
Published Version: doi:10.1073/pnas.0903323106
Terms of Use: This article is made available under the terms and conditions applicable to Open Access Policy Articles, as set forth at http://nrs.harvard.edu/urn-3:HUL.InstRepos:dash.current.terms-of-use#OAP
Citable link to this page: http://nrs.harvard.edu/urn-3:HUL.InstRepos:4031542

Show full Dublin Core record

This item appears in the following Collection(s)

  • FAS Scholarly Articles [7495]
    Peer reviewed scholarly articles from the Faculty of Arts and Sciences of Harvard University
 
 

Search DASH


Advanced Search
 
 

Submitters