Results 31 to 40 of about 166 (116)

The puzzle assembled: Ediacaran guide fossil Cloudina reveals an old proto-Gondwana seaway

Geology, 2014
ABSTRACTDuring the Ediacaran the Clymene Ocean separated the Lau-rentia, Amazonia, and Rio Apa cratons from several landmasses to the west forming the proto-Gondwana supercontinent. However, no clear evidence about the existence of Ediacaran epeiric seas over those landmasses has been found.
Warren, L. V., Quaglio, F., Riccomini, C., Simoes, M. G., Poire, D. G., Strikis, N. M., Anelli, L. E., Strikis, P. C.   +7 more
openaire   +3 more sources

Análisis paleontológicos a través límite Ediacárico-Cámbrico, Grupo Alto Corumbá, Brasil

Estudios Geologicos, 2019
Se presenta en este trabajo el análisis paleontológico de 26 especies fósiles muestradas en cinco cortes de las Formaciones de Tamengo y Guaicurus en las regines de Corumbá y Ladário: canteras de Corcal y Laginha, Porto Sobramil, Porto Figueiras y ...
R.R. Adôrno, D.H.G. Walde, D.A. Do Carmo, M. Denezine, I. Cortijo, E.A.M. Sanchez, T.C. Tobias, G. Fazio, L.V. Warren, B.D. Erdtmann, Y. Cai, M. Giorgioni, M.E.A.F. Ramos, M.C. Baptista, E.M. Guimarães, M. F. Figueiredo, G.J. Germs   +16 more
doaj   +1 more source

Carbonate sedimentology: An evolved discipline

The Depositional Record, Volume 12, Issue 1, February 2026.
Abstract Although admired and examined since antiquity, carbonate sediment and rock research really began with Charles Darwin who, during a discovery phase, studied, documented and interpreted their nature in the mid‐19th century. The modern discipline, however, really began after World War II and evolved in two distinct phases.
Noel P. James, Peir K. Pufahl
wiley   +1 more source

Litoestratigrafía, Bioestratigrafía y Correlaciones de las Sucesiones Sedimentarias del Neoproterozoico-Cámbrico del cratón del Río de la Plata (Uruguay y Argentina)

Latin American Journal of Sedimentology and Basin Analysis, 2021
Se compara la lito- bio- y quimioestratigrafía de sucesiones sedimentarias del Neoproterozoico del Cratón del Río de la Plata, a saber: Grupo Arroyo del Soldado (GAS), Uruguay y Grupo Sierras Bayas - Formación Cerro Negro (GSB-FmCN) de Tandilia ...
Claudio Gaucher, Daniel G. Poiré, Lucía Gómez Peral, Leticia Chiglino   +3 more
doaj   +2 more sources

Corumbella and in situ Cloudina in association with thrombolites in the Ediacaran Itapucumi Group, Paraguay

Terra Nova, 2011
Terra Nova, 23, 382–389, 2011AbstractAn in situ assemblage of Cloudina, thrombolites and an ichnofossil (cf. Archaeonassa), together with fragments of Corumbella werneri, is reported here, from a tidally influenced, shallow, lagoonal setting on a carbonate ramp within the Itapucumi Group, Paraguay.
Warren, Lucas V., Fairchild, Thomas R., Gaucher, Claudio, Boggiani, Paulo C., Poire, Daniel Gustavo, Anelli, Luís E., Inchausti, Julio C. G.   +6 more
openaire   +6 more sources

Updated stratigraphic framework and biota of the Ediacaran and Terreneuvian in the Alcudia-Toledo Mountains of the Central Iberian Zone, Spain

Estudios Geologicos, 2019
An updated stratigraphic subdivision of the Ediacaran and Terreneuvian in the Alcudia valley and the Toledo Mountains, Central Iberian Zone, is documented here.
J. J. Álvaro, I. Cortijo, S. Jensen, S. Lorenzo, A. P. Pieren   +4 more
doaj   +1 more source

Transport of ‘Nama’‐type biota in sediment gravity and combined flows: Implications for terminal Ediacaran palaeoecology

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, William J. McMahon, Andreas Nduutepo, Paulina Pokolo, Helke Mocke, Sean McMahon, Catherine E. Boddy, Alexander G. Liu   +7 more
wiley   +1 more source

Cloudina-Corumbella-Namacalathus association from the Itapucumi Group, Paraguay: Increasing ecosystem complexity and tiering at the end of the Ediacaran [PDF]

Precambrian Research, 2017
Abstract The intriguing Ediacaran fossil Namacalathus is described from limestones of the Tagatiya Guazu Formation, Itapucumi Group, Paraguay. This is the fifth occurrence of the genus in the Ediacaran geological record. The Paraguayan Namacalathus specimens are preserved as partially complete spheroidal cups with an opening at the top and thin ...
Warren, Lucas Verissimo, Quaglio, Fernanda, Simoes, Marcello Guimaraes, Gaucher, Claudio, Riccomini, Claudio, Poire, Daniel G., Freitas, Bernardo Tavares, Boggiani, Paulo C., Sial, Alcides Nobrega   +8 more
openaire   +5 more sources

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

Decline and fall of the Ediacarans: late‐Neoproterozoic extinctions and the rise of the modern biosphere

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