Results 101 to 110 of about 14,980 (261)

New taphonomic and sedimentological insights into the preservation of high-relief Ediacaran fossils at Upper Island Cove, Newfoundland

, 2023
Christopher McKean, Rod S. Taylor, Duncan McIlroy   +2 more
openalex   +1 more source

Revisiting the Ediacaran-Cambrian boundary in the Ossa-Morena Zone (SW Iberia) [PDF]

, 2019
Some of the best outcrops of Iberia to study the Ediacaran-Cambrian boundary are located in the Ossa- Morena Zone. In the Crato-Campo Maior region (SW Iberia, Portugal), this stratigraphic boundary is marked by an angular unconformity (Gonçalves, 1971 ...
Dias da Silva, I., Gama, C., Pereira, M. F., Silva, J.B.   +3 more
core  

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

, 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, A Baddeley, A Baddeley, AG Liu, AG Liu, AL Shanks, Alexander G. Liu, AM Penny, AP Benus, B Gaylord, B Gaylord, B Shen, C Fraley, Charlotte G. Kenchington, D Stoyan, DA Wood, E Landing, EJ McIntire, Emily G. Mitchell, GM Narbonne, GM Narbonne, GM Narbonne, GM Narbonne, H Hua, HJ Hofmann, J Besag, J Illian, Jack J. Matthews, JF Hoyal Cuthill, JG Gehling, JM Fragoso, K Araki, KJ Peterson, L Chen, M Berman, M Thomas, MA Fedonkin, MD Brasier, MD Brasier, ME Clapham, ME Clapham, ML Droser, NB Loosmore, Nicholas J. Butterfield, P Diggle, P Grabarnik, R Pélissier, SA Levin, SAF Darroch, SE Russo, SN Chiu, T Wiegand, T Wiegand, T Wiegand, T Wiegand, T Wiegand, X Yuan, Y Lin   +57 more
core   +4 more sources

a new Pc-C boundary section [PDF]

, 2016
The widespread, terminal Ediacaran Dengying Formation (~ 551–~ 542 Ma) of South China hosts one of the most prominent negative carbonate carbon isotope excursions in Earth's history and thus bears on the correlation of the Precambrian–Cambrian boundary ...
Gamper, A., Heubeck, C., Hohl, S., Ohnemueller, F., Struck, U.   +4 more
core   +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  

In silico transitions to multicellularity

, 2014
The emergence of multicellularity and developmental programs are among the major problems of evolutionary biology. Traditionally, research in this area has been based on the combination of data analysis and experimental work on one hand and theoretical ...
Duran-Nebreda, Salva, Solé, Ricard V.
core   +1 more source

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., Condon, Daniel J., Ford, Trevor D., Noble, Stephen R., Pharaoh, Timothy C., Wilby, Philip R.   +5 more
core   +1 more source

Ocean redox structure across the Late Neoproterozoic Oxygenation Event: A nitrogen isotope perspective [PDF]

, 2014
International audienceThe end of the Neoproterozoic Era (1000 to 541 Ma) is widely believed to have seen the transition from a dominantly anoxic to an oxygenated deep ocean.
Ader, Magali,, Busigny, Vincent,, Halverson, Galen,, Kunzmann, Marcus,, Nogueira, Afonso C. R., Sansjofre, Pierre,, Trindade, Ricardo I. F.   +6 more
core   +5 more sources

Chemotrophic Microbial Mats and Their Potential for Preservation in the Rock Record [PDF]

, 2009
Putative microbialites are commonly regarded to have formed in association with photosynthetic microorganisms, such as cyanobacteria. However, many modern microbial mat ecosystems are dominated by chemotrophic bacteria and archaea.
Bailey, Jake V., Corsetti, Frank A., Joye, Samantha B., Orphan, Victoria J.   +3 more
core   +1 more source

Chronology of Ediacaran sedimentary and biogeochemical shifts along eastern Gondwanan margins

Communications Earth & Environment
Determining causal relationships between environmental change and early animal evolution has been limited by our lack of a robust temporal framework for the Ediacaran Period (635-539 million years ago).
Marjorie D. Cantine, Alan D. Rooney, Andrew H. Knoll, Irene Gómez-Pérez, Badar al Baloushi, Kristin D. Bergmann   +5 more
doaj   +1 more source