Results 51 to 60 of about 12,978 (245)

Oxidation of the Ediacaran Ocean

Nature, 2006
Oxygenation of the Earth's surface is increasingly thought to have occurred in two steps. The first step, which occurred approximately 2,300 million years (Myr) ago, involved a significant increase in atmospheric oxygen concentrations and oxygenation of the surface ocean.
Fike, D. A., Grotzinger, J. P., Pratt, L. M., Summons, R. E.   +3 more
openaire   +3 more sources

The first animals : ca. 760-million-year-old sponge-like fossils from Namibia [PDF]

, 2012
One of the most profound events in biospheric evolution was the emergence of animals, which is thought to have occurred some 600–650 Ma. Here we report on the discovery of phosphatised body fossils that we interpret as ancient sponge-like fossils and ...
Brain, C.K., Condon, Daniel, Brain, CK, Botha, Andre, Fallick, A., Sturrock, C., Allison, Stuart G., Herd, DA, Prave, A., Fallick, Anthony, Brain, Charles Kimberlin (Bob), Sturrock, Craig, Hoffman, K.H., Allison, Stuart, Allison, SG, Botha, A, Condon, D.J., Botha, A., Allison, S.G., Herd, Donald A., Hoffmann, K-H, Sturrock, C, Prave, Anthony R., Brain, C., Brain, C.K. Bob, Young, I., Condon, Daniel J., Herd, Donald, Herd, D.A., Prave, Anthony, Young, Iain, Prave, AR, Hoffmann, Karl-Heinz, Brain, C. K. 'Bob', Condon, DJ, Fallick, Anthony E., Fallick, AE   +36 more
core   +1 more source

The developmental biology of Charnia and the eumetazoan affinity of the Ediacaran rangeomorphs

Science Advances, 2021
Rangeomorphs represent a long-extinct group of eumetazoans with a bodyplan unlike anything alive today. Molecular timescales estimate that early animal lineages diverged tens of millions of years before their earliest unequivocal fossil evidence.
F. Dunn, Alexander G. Liu, D. Grazhdankin, Philip B. Vixseboxse, Joseph T. Flannery‐Sutherland, E. Green, Simon Harris, P. Wilby, P. Donoghue   +8 more
semanticscholar   +1 more source

The role of volcanic-derived clays in the preservation of Ediacaran biota from the Itajaí Basin (ca. 563 Ma, Brazil)

Scientific Reports, 2021
The early evolution of metazoans has been reconstructed by studies on exceptionally preserved molds in siliciclastic rocks from the Ediacaran Period.
Bruno Becker-Kerber, Abderrazak El Albani, Kurt Konhauser, Ahmed Abd Elmola, Claude Fontaine, Paulo S. G. Paim, Arnaud Mazurier, Gustavo M. E. M. Prado, Douglas Galante, Pedro B. Kerber, Ana L. Z. da Rosa, Thomas R. Fairchild, Alain Meunier, Mírian L. A. F. Pacheco   +13 more
doaj   +1 more source

Cryptic terrestrial fungus-like fossils of the early Ediacaran Period

Nature Communications, 2021
The colonization of land by fungi had a significant impact on the terrestrial ecosystem and biogeochemical cycles on Earth surface systems. Although fungi may have diverged ~1500–900 million years ago (Ma) or even as early as 2400 Ma, it is uncertain ...
T. Gan, Tai-Yi Luo, K. Pang, Chuan-Ming Zhou, Guanghong Zhou, B. Wan, Gang Li, Q. Yi, A. Czaja, S. Xiao   +9 more
semanticscholar   +1 more source

The occurrence of Dickinsonia in non-marine facies

Estudios Geologicos, 2019
Dickinsonia in the central Urals occurs in a succession transitional from marginal marine to non-marine. Even within this sequence Dickinsonia appears to be restricted to the least marine facies interpreted as a coastal lagoon surrounded by tidal flats ...
N. I. Bobkov, A. V. Kolesnikov, A. V. Maslov, D. V. Grazhdankin   +3 more
doaj   +1 more source

New Facies Model and Carbon Isotope Stratigraphy for an Ediacaran Carbonate Platform From South America (Tamengo Formation—Corumbá Group, SW Brazil)

Frontiers in Earth Science, 2022
The Ediacaran is a period characterized by the diversification of early animals and extensive neritic carbonate deposits. These deposits are still not well understood in terms of facies and carbon isotope composition (δ13C). In this study we focus on the
Maria E. A. F. Ramos, Martino Giorgioni, Detlef H. G. Walde, Dermeval A. do Carmo, Gabriella Fazio, Lucieth C. Vieira, Matheus Denezine, Roberto V. Santos, Rodrigo R. Adôrno, Rodrigo R. Adôrno, Lucas Lage Guida   +10 more
doaj   +1 more source

Palaeolatitudinal distribution of the Ediacaran macrobiota [PDF]

, 2021
Macrofossils of the late Ediacaran Period ( c. 579–539 Ma) document diverse, complex multicellular eukaryotes, including early animals, prior to the Cambrian radiation of metazoan phyla.

core   +2 more sources

Strike-slip fault system and its control on ediacaran hydrocarbon system in central Sichuan Basin: insights from petrology, U-Pb dating and seismic interpretation

Frontiers in Earth Science
Strike-slip faults are closely related to the enrichment of hydrocarbon resources, with a series of large oil and gas fields associated with strike-slip faults discovered in regions such as the Ordos Basin in China and the West Siberian Basin.
Yongjing Cen, Jianhai Li, Feng Liang, Lien Wang, Xin Zhang   +4 more
doaj   +1 more source

Sea level controls on Ediacaran-Cambrian animal radiations

Science Advances
The drivers of Ediacaran-Cambrian metazoan radiations remain unclear, as does the fidelity of the record. We use a global age framework [580–510 million years (Ma) ago] to estimate changes in marine sedimentary rock volume and area, reconstructed ...
F. Bowyer, Rachel A. Wood, Mariana Yilales   +2 more
semanticscholar   +1 more source