Results 51 to 60 of about 848 (154)
A composite reference section for terminal Proterozoic strata of southern Namibia [PDF]
, 1998 Integrated sequence stratigraphic and chemostratigraphic data yield a framework for correlations of stratigraphic units in the terminal Proterozoic to Cambrian Witvlei and Nama Groups of Namibia.
Grotzinger, John P. +3 more
core +1 more source
Sedimentology, Volume 72, Issue 2, Page 365-407, February 2025.ABSTRACT The lower Nama Group in southern Namibia contains trace fossils and soft‐bodied and biomineralized macro‐organisms from the terminal Ediacaran Period (ca 550 to 539 Ma), offering insights into early metazoan evolution. Interpretation of the fossilized Nama Group organisms as being preserved in, or very close to, the environments in which they ...
Brennan O'Connell +7 more
wiley +1 more source
How to engineer a habitable planet: the rise of marine ecosystem engineers through the Phanerozoic
Palaeontology, Volume 67, Issue 5, September/October 2024.Abstract Ecosystem engineers are organisms that modify their physical habitats in a way that alters resource availability and the structure of the communities they live in. The evolution of ecosystem engineers over the course of Earth history has thus been suggested to have been a driver of macroevolutionary and macroecological changes that are ...
Alison T. Cribb, Simon A. F. Darroch
wiley +1 more source
Developing proxies to constrain redox gradients in terminal Ediacaran oceans [PDF]
, 2015 There is a long-standing interest in the relationship between the rise of early Metazoans and changes in the redox structure of the oceans. As such, there is a need for reliable geochemical proxy archives that record palaeo-redox.
Tostevin, R
core
U-Pb geochronology and global context of the Charnian Supergroup, UK: constraints on the age of key Ediacaran fossil assemblages [PDF]
, 2014 U-Pb (zircon) ages for key stratigraphic volcanic horizons within the ∼3200-m-thick Ediacaran-age Charnian Supergroup provide an improved age model for the included Avalonian assemblage macrofossils and, hence, temporal constraints essential for ...
Carney, John N. +5 more
core +1 more source
Biological Reviews, Volume 99, Issue 1, Page 110-130, February 2024.ABSTRACT The end‐Neoproterozoic transition marked a gradual but permanent shift between distinct configurations of Earth's biosphere. This interval witnessed the demise of the enigmatic Ediacaran Biota, ushering in the structured trophic webs and disparate animal body plans of Phanerozoic ecosystems.
Giovanni Mussini, Frances S. Dunn
wiley +1 more source
Biodiversity of the Ediacaran-early Cambrian transition in northwestern Argentina and related areas [PDF]
, 2012 The Ediacaran-early Cambrian is a significant time of geological history in terms of biodiversity dynamics. During this time-span a particular soft-bodied fauna developed and disappeared, being replaced by the emergent skeleton-bearing faunas.
Aceñolaza, Florencio Gilberto
core
Macroevolution and macroecology through deep time [PDF]
, 2007 The fossil record documents two mutually exclusive macroevolutionary modes separated by the transitional Ediacaran Period. Despite the early appearance of crown eukaryotes and an at least partially oxygenated atmosphere, the pre-Ediacaran biosphere was ...
Butterfield, N. J.
core +1 more source
Ediacaran Macro Body Fossils [PDF]
, 2010 This paper, Ediacaran Macro Body Fossils, reports a new discovery of well preserved three dimensional macro body fossils of the Ediacaran Period in central YunNan province in the People's Republic of China.
ChuanWei Yang +5 more
core +1 more source
Ichnological evidence for meiofaunal bilaterians from the terminal Ediacaran and earliest Cambrian of Brazil [PDF]
The evolutionary events during the Ediacaran–Cambrian transition (~541 Myr ago) are unparalleled in Earth history. The fossil record suggests that most extant animal phyla appeared in a geologically brief interval, with the oldest unequivocal bilaterian ...
Boggiani, Paulo C. +11 more
core +1 more source