Results 41 to 50 of about 11,063 (154)

Animal emergence during Snowball Earths by thermosynthesis in submarine hydrothermal vents [PDF]

open access: yes, 2009
Darwin already commented on the lateness in the fossil record of the emergence of the animals, calling it a valid argument against his theory of evolution^1^.
Anthonie W. J. Muller
core   +2 more sources

Paradigm shift in determining Neoproterozoic atmospheric oxygen [PDF]

open access: yes, 2016
ACKNOWLEDGMENTS We thank the Geological Survey of Australia for permission to sample the Empress 1A and Lancer 1 cores, the Natural Sciences and Engineering Research Council of Canada for financial support (grant #7961–15) of U.
Benison, Kathleen   +7 more
core   +3 more sources

Food sources for the Ediacara biota communities

open access: yesNature Communications, 2020
Complex macroscopic organisms are first found in the Ediacaran period, but their ecology during this time is not well understood. Here, Bobrovskiy et al.
Ilya Bobrovskiy   +3 more
doaj   +1 more source

Cryptic Disc Structures Resembling Ediacaran Discoidal Fossils from the Lower Silurian Hellefjord Schist, Arctic Norway [PDF]

open access: yes, 2016
The Hellefjord Schist, a volcaniclastic psammite-pelite formation in the Caledonides of Arctic Norway contains discoidal impressions and apparent tube casts that share morphological and taphonomic similarities to Neoproterozoic stem-holdfast forms.
Daly, Stephen   +3 more
core   +5 more sources

Ediacaran metazoan fossil record from South America and its implications in the studies about origin and complexification of animal life [PDF]

open access: yesGeologia USP. Série Científica, 2013
The Ediacaran Period marks the first appearance of complex macroscopic organisms in the fossil record. Current evidence indicates that Ediacara biota is composed of animals, groups of extinct giant protists, algae and other organisms without proven ...
Bruno Becker Kerber   +4 more
doaj   +1 more source

Subsidence history of the Ediacaran Johnnie Formation and related strata of southwest Laurentia: Implications for the age and duration of the Shuram isotopic excursion and animal evolution [PDF]

open access: yes, 2018
The Johnnie Formation and associated Ediacaran strata in southwest Laurentia are ~3000 m thick, with a Marinoan cap carbonate sequence at the bottom, and a transition from Ediacaran to Cambrian fauna at the top.
Wernicke, Brian P., Witkosky, Rebecca
core   +1 more source

Arumberiamorph structure in modern microbial mats: implications for Ediacaran palaeobiology [PDF]

open access: yesBSGF - Earth Sciences Bulletin, 2017
In the course of studying modern halotolerant microbial mats in salterns near the village of Kervalet, western France, we observed fanning-out and curved series of macroscopic ridges on the surface of a newly formed biofilm.
Kolesnikov Anton V.   +4 more
doaj   +1 more source

Review of the Ediacaran-Lower Ordovician (pre-Sardic) stratigraphic framework of the Eastern Pyrenees, southwestern Europe

open access: yesGeologica Acta, 2018
The Ediacaran-Lower Ordovician successions exposed in the Eastern Pyrenees are updated and revised based on recent U-Pb zircon radiometric ages, intertonguing relationships of carbonate-dominated strata, and onlapping patterns marking the top of volcano ...
M. Padel   +3 more
doaj   +3 more sources

Aspects of the taphonomy of the Cambrian Explosion in North Greenland [PDF]

open access: yes, 2017
This thesis describes and elucidates the taphonomic pathways responsible for the exceptional preservation of some of the most common elements of the Sirius Passet Lagerstätte (early Cambrian), North Greenland.
STRANG, KATIE,MARGARET
core  

Reconstructing the reproductive mode of an Ediacaran macro-organism. [PDF]

open access: yes, 2015
Enigmatic macrofossils of late Ediacaran age (580-541 million years ago) provide the oldest known record of diverse complex organisms on Earth, lying between the microbially dominated ecosystems of the Proterozoic and the Cambrian emergence of the modern
A Baddeley   +57 more
core   +4 more sources

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