Results 21 to 30 of about 987 (207)

Early eukaryotic microfossils of the late Palaeoproterozoic Limbunya Group, Birrindudu Basin, northern Australia

Papers in Palaeontology, Volume 9, Issue 6, November/December 2023., 2023
Abstract Fine‐grained, siliciclastic units of the >1642 ± 3.9 Ma late Palaeoproterozoic Limbunya Group, Birrindudu Basin host rich, well‐preserved organic‐walled microfossil assemblages that include members of total‐group eukaryotes. These assemblages include taxa characteristic of this interval such as Tappania plana and Satka favosa, as well as less ...
Leigh Anne Riedman, Susannah M. Porter, Maxwell A. Lechte, Angelo dos Santos, Galen P. Halverson   +4 more
wiley   +1 more source

Ediacaran–Cambrian bioturbation did not extensively oxygenate sediments in shallow marine ecosystems

Geobiology, Volume 21, Issue 4, Page 435-453, July 2023., 2023
Abstract The radiation of bioturbation during the Ediacaran–Cambrian transition has long been hypothesized to have oxygenated sediments, triggering an expansion of the habitable benthic zone and promoting increased infaunal tiering in early Paleozoic benthic communities.
Alison T. Cribb, Sebastiaan J. van de Velde, William M. Berelson, David J. Bottjer, Frank A. Corsetti   +4 more
wiley   +1 more source

Seaward‐Dipping Reflector Influence on Seafloor Magnetostratigraphy—A Pelotas Basin View

Geophysical Research Letters, Volume 49, Issue 23, 16 December 2022., 2022
Abstract Previous works used marine magnetic survey data and interpreted magnetic anomalies related to seaward‐dipping reflectors (SDRs) as oceanic crust or SDR age constraints in the South Atlantic Ocean. However, we advise against using SDR‐related magnetic anomalies to constrain ages because of the mostly low‐dipping geometry causing the overlapping
Henrique Serratt, Claudia Domingues Teixeira, Tiago Jonatan Girelli, Marcelo Kehl de Souza, Mateus Rodrigues Vargas, Adalene Moreira Silva, Farid Chemale Jr.   +6 more
wiley   +1 more source

Implementación de políticas de prevención y control de la obesidad infantil en Estados Unidos y Latinoamérica: lecciones para la investigación y la práctica transfronterizas

Obesity Reviews, Volume 22, Issue S5, Octubre 2021., 2021
Resumen Aunque se han hecho avances en el desarrollo y aplicación a gran escala de intervenciones eficaces contra la obesidad infantil, los retos siguen siendo importantes. Nuestro objetivo era comprender las causas del éxito de Estados Unidos y los países latinoamericanos en la implementación de políticas y programas (PYP) contra la obesidad e ...
Rafael Pérez‐Escamilla, Mireya Vilar‐Compte, Elizabeth Rhodes, Olga L. Sarmiento, Camila Corvalan, Rachel Sturke, Susan Vorkoper   +6 more
wiley   +1 more source

The ‘classic stromatolite’ Cryptozoön is a keratose sponge‐microbial consortium

Geobiology, Volume 19, Issue 2, Page 189-198, March 2021., 2021
Abstract Animal evolution transformed microbial mat development. Canonically inferred negative effects include grazing, disturbance and competition for space. In contrast, ancient examples of cooperation between microbial mats and invertebrates have rarely been reported.
Jeong‐Hyun Lee, Robert Riding
wiley   +1 more source

The continuing debate on deep molluscan phylogeny: evidence for Serialia (Mollusca, Monoplacophora + Polyplacophora). [PDF]

Biomed Res Int, 2013
Molluscs are a diverse animal phylum with a formidable fossil record. Although there is little doubt about the monophyly of the eight extant classes, relationships between these groups are controversial. We analysed a comprehensive multilocus molecular data set for molluscs, the first to include multiple species from all classes, including five ...
Stöger I, Sigwart JD, Kano Y, Knebelsberger T, Marshall BA, Schwabe E, Schrödl M.   +6 more
europepmc   +2 more sources

Petrochemical structure of Early Vendian basalt series in the South-Western part of the East-European platform

RUDN Journal of Engineering Research, 2010
Early Vendian volcanic volynskaya series in the South-Western part of the East-European platform contains two types of rock's paragenesa which differ by petrochemical trends.
K I Sveshnikov, E I Derevskaja, V L Prichodko, Ya O Kosovsky   +3 more
doaj   +1 more source

Paleomagnetism of Upper Vendian sediments from the Winter Coast, White Sea region, Russia: Implications for the paleogeography of Baltica during Neoproterozoic times [PDF]

, 2002
Paleomagnetic results from an Upper Vendian sedimentary sequence exposed along the White Sea shoreline, NW Russia are described. These classical exposures have been the subject of intense paleontological investigations due to their well-preserved ...
Iosifidi, A., Tait, J., Bachtadse, V., Popov, V., Jennifer Tait, Valerian Bachtadse, Viktor Popov, Alexei Khramov, Alexander Iosifidi, Khramov, A.   +9 more
core   +1 more source

The astronomical pulse of global extinction events. [PDF]

ScientificWorldJournal, 2006
The linkage between astronomical cycles and the periodicity of mass extinctions is reviewed and discussed. In particular, the apparent 26 million year cycle of global extinctions may be related to the motion of the solar system around the galaxy, especially perpendicular to the galactic plane.
Lewis DF, Dorne JL.
europepmc   +2 more sources

GROUNDWATER EXCHANGE IN THE BALTIC SHIELD MARGINAL AREAS AND ADJACENT ARTESIAN BASINS BASED ON ISOTOPE AND HYDROCHEMISTRY DATA. SCIENTIFIC PROBLEMS AND PRACTICAL APPLICATIONS. KARELIAN ISTHMUS

Transactions of the Karelian Research Centre of the Russian Academy of Sciences, 2016
Water chemical and isotopic composition (deuterium content and oxygen-18), as well as the activity of tritium in groundwater of Riphean aquifer and Vendian complex in the Karelian Isthmus were studied.
Grigory Voroniuk, Galina Borodulina, Irina Krainyukova, Igor Tokarev   +3 more
doaj   +1 more source