IMIS | Flanders Marine Institute

Flanders Marine Institute

Platform for marine research


Publications | Institutes | Persons | Datasets | Projects | Maps
[ report an error in this record ]basket (0): add | show Print this page

TEM evidence for eukaryotic diversity in mid-Proterozoic oceans
Javaux, E.J.; Knoll, A.H.; Walter, M.R. (2004). TEM evidence for eukaryotic diversity in mid-Proterozoic oceans. Geobiol. 2(3): 121-132.
In: Geobiology. Blackwell: Oxford. ISSN 1472-4677; e-ISSN 1472-4669, more
Peer reviewed article  

Available in  Authors 
    VLIZ: Open Repository 279856 [ OMA ]

Authors  Top 
  • Javaux, E.J., more
  • Knoll, A.H.
  • Walter, M.R.

    Biomarker molecular fossils in 2770 Ma shales suggest that the Eucarya diverged from other principal domains early in Earth history. Nonetheless, at present, the oldest fossils that can be assigned to an extant eukaryotic clade are filamentous red algae preserved in ca. 1200 Ma cherts from Arctic Canada. Between these records lies a rich assortment of potentially protistan microfossils. Combined light microscopy, scanning electron microscopy, and transmission electron microscopy on 1500-1400 Ma fossils from the Roper Group, Australia, and broadly coeval rocks from China show that these intermediate assemblages do indeed include a moderate diversity of eukaryotic remains. In particular, preserved cell wall ultrastructure, observed using transmission electron microscopy (TEM), can help to bridge the current stratigraphic gap between the unambiguous eukaryotic morphologies of later Proterozoic assemblages and molecular biomarkers in much older rocks.

All data in the Integrated Marine Information System (IMIS) is subject to the VLIZ privacy policy Top | Authors