Now showing items 1-7 of 7
Can NanoSIMS probe quantitatively the geochemical composition of ancient organic-walled microfossils? A case study from the early Neoproterozoic Liulaobei Formation
Assessing the biogenicity of Precambrian putative remnants of life requires solid criteria. Among possible criteria, searching for evidence of pristine biological signatures and identifying various biological organic matter ...
Extensive marine anoxia during the terminal Ediacaran Period
The terminal Ediacaran Period witnessed the decline of the Ediacara biota (which may have included many stem-group animals). To test whether oceanic anoxia might have played a role in this evolutionary event, we measured ...
Taphonomy And Biological Affinity Of Three-Dimensionally Phosphatized Bromalites From The Middle Ordovician Winneshiek Lagerstätte, Northeastern Iowa, USA
The Winneshiek Lagerst¨atte occurs within an Ordovician meteorite impact structure beneath part of the city of Decorah, Iowa. The Lagerst¨atte has yielded an atypical marine fauna including phyllocarid crustaceans, ...
A unifying model for Neoproterozoic–Palaeozoic exceptional fossil preservation through pyritization and carbonaceous compression
Soft-tissue fossils capture exquisite biological detail and provide our clearest views onto the rise of animals across the Ediacaran–Cambrian transition. The processes contributing to fossilization of soft tissues, however, ...
Transient marine euxinia at the end of the terminal Cryogenian glaciation
(Springer Nature, 2018-08-01)
Termination of the terminal Cryogenian Marinoan snowball Earth glaciation (similar to 650-635 Ma) is associated with the worldwide deposition of a cap carbonate. Modeling studies suggest that, during and immediately following ...
Late Ediacaran trackways produced by bilaterian animals with paired appendages
Ediacaran trace fossils provide key paleontological evidence for the evolution of early animals and their behaviors. Thus far, however, this fossil record has been limited to simple surface trails and relatively shallow ...