Results 11 to 20 of about 287 (153)

Developmental principles: fact or fiction. [PDF]

ScientificWorldJournal, 2012
While still at school, most of us are deeply impressed by the underlying principles that so beautifully explain why the chemical elements are ordered as they are in the periodic table, and may wonder, with the theoretician Brian Goodwin, “whether there might be equally powerful principles that account for the awe-inspiring diversity of body forms in ...
Durston AJ.
europepmc   +2 more sources

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 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

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 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

THE NEPSKY-1 IMPACT CRATER AND ITS FILL DEPOSITS ON THE BASEMENT ROOF OF THE SIBERIAN PLATFORM

Геодинамика и тектонофизика, 2020
In the Earth studies, discoveries and investigations of impact craters buried beneath thick sediments are sporadic so far and may still remain inefficient, unless geophysical surveys of the areas of interest are initiated. Such studies can provide useful
M. I. Gyokche, A. V. Plyusnin
doaj   +1 more source

COMPOSITION AND STRUCTURE OF THE NEPSKY AND TIRSKY FORMATION OF THE PRILENSK-NEPSKY STRUCTURAL-FACIES ZONE OF THE NEPA-BOTUOBA ANTECLISE BY THE RESULTS OF CORE MATERIAL STUDIES

Известия высших учебных заведений: Геология и разведка, 2020
Background. Clarification of the structure of sedimentary formations located on the Siberian Platform by means of lithological and petrographic core studies has a theoretical and practical significance for the creation of geological models for oil and ...
A. V. Plyusnin, M. I. Gyokche
doaj   +1 more source