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A Gunflint-type microbiota from the Duck Creek dolomite, Western AustraliaTwo-billion-year-old black chert lenses from the Duck Creek formation, northwestern Western Australia, contain abundant organically preserved microorganisms which are morphologically similar to fossils of approximately the same age from the Gunflint formation, Ontario. Entities include a relatively small (5-15 micron) coccoid taxon morphologically comparable to Huroniospora Barghoorn, a larger coccoid form comparable to an apparently planktonic alga from the Gunflint, Gunflintia Barghoorn, and Eoastrion Barghoorn (Metallogenium Perfil'ev). Gunflint-type assemblages had a wide geographic distribution in middle Precambrian times, and these assemblages may eventually prove useful as biostratigraphic indices.
Document ID
19770044923
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Knoll, A. H.
(Harvard Univ. Cambridge, MA, United States)
Barghoorn, E. S.
(Harvard University Cambridge, Mass., United States)
Date Acquired
August 8, 2013
Publication Date
December 1, 1976
Publication Information
Publication: Origins of Life
Volume: 7
Subject Category
Life Sciences (General)
Accession Number
77A27775
Funding Number(s)
CONTRACT_GRANT: NSF DES-73-06514
CONTRACT_GRANT: NGL-22-007-069
Distribution Limits
Public
Copyright
Other

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