Results 11 to 20 of about 14,980 (261)

Ediacaran Macro Body Fossils [PDF]

open access: yesNature Precedings, 2010
AbstractThis paper, Ediacaran Macro Body Fossils, reports a new discovery of well preserved three dimensional macro body fossils of the Ediacaran Period in central YunNan province in the People's Republic of China. These body fossils will enable more detailed and in-depth exploration of the evolution of multi-cellular macro organisms on this planet ...
Timothy D. Huang   +5 more
openaire   +4 more sources

Large Igneous Province Record Through Time and Implications for Secular Environmental Changes and Geological Time‐Scale Boundaries

open access: yesGeophysical Monograph Series, Page 1-26., 2021

Exploring the links between Large Igneous Provinces and dramatic environmental impact

An emerging consensus suggests that Large Igneous Provinces (LIPs) and Silicic LIPs (SLIPs) are a significant driver of dramatic global environmental and biological changes, including mass extinctions.
Richard E. Ernst   +8 more
wiley  

+4 more sources

Ediacaran oxidation and biotic evolution [PDF]

open access: bronzeNature, 2007
The link between the radiation of various lineages of eukaryotes in the latest Proterozoic and massive environmental changes--oxygenation, global ice ages and bolide impact--is the focus of much research interest. Fike et al. use carbon and sulphur isotope-chemostratigraphic data from Oman to propose three stages of oxidation in the Ediacaran oceans ...
Kathleen Grey, Clive R. Calver
openalex   +3 more sources

An Increase in Animal Diversity was Facilitated by Ecologically-Driven Brain Complexity Throughout the Cambrian. [PDF]

open access: yesBioessays
The Brain‐First Hypothesis suggests that the Cambrian transition from animals with simple body plans and simple brains to more complex animals was driven by a selection for brains with increased neural processing, following increased ecological complexity, and the networks underlying brain development were co‐opted to pattern other complex systems ...
Chipman AD.
europepmc   +2 more sources

Evolution of Holdfast Diversity and Attachment Strategies of Ediacaran Benthic Macroalgae

open access: yesFrontiers in Earth Science, 2021
Holdfast morphologies and attachment strategies of benthic macroalgae are somewhat flexible and controlled by both the substrate condition and species.
Xiaopeng Wang   +15 more
doaj   +1 more source

Carbonate storm deposits and C, O isotopes of the Lagoa do Jacaré Formation (Ediacaran) in the Paraopeba area, Bambuí Group, Brazil [PDF]

open access: yesBrazilian Journal of Geology, 2022
A section investigated in the region of Paraopeba, Minas Gerais, provided detailed sedimentologic, stratigraphic and chemostratigraphic data from the Ediacaran Lagoa do Jacaré Formation, Bambuí Group, Southeast Brazil.
Marcio Vinicius Santana Dantas   +6 more
doaj   +1 more source

C- AND Sr-ISOTOPE CHEMOSTRATIGRAPHY OF THE UPPER PROTEROZOIC – LOWER CAMBRIAN TRANSITIONAL DEPOSITS IN THE LENA-ANABAR TROUGH (NORTHEASTERN SIBERIAN PLATFORM)

open access: yesГеодинамика и тектонофизика, 2023
Studies have been made of the carbon and strontium isotope composition in carbonate sediments of the Khorbusuonka group and Kessyusa formation corresponding to the Upper Vendian in deep Khastakhskaya-930 and Burskaya-341-0 boreholes at the northeastern ...
B. B. Kochnev   +2 more
doaj   +1 more source

Stratigraphy of the Khuvsgul Group, Mongolia

open access: yesMongolian Geoscientist, 2021
The Khuvsgul Group (Khuvsgul Province, Mongolia) is a Late Neoproterozoic to Cambrian carbonate-dominated succession that includes minor glacial diamictite and one of the largest known ore-grade phosphate deposits in the world.
Eliel Anttila   +2 more
doaj   +1 more source

Ediacaran origin and Ediacaran-Cambrian diversification of Metazoa. [PDF]

open access: yesSci Adv
The timescale of animal diversification has been a focus of debate over how evolutionary history should be calibrated to geologic time. Molecular clock analyses have invariably estimated a Cryogenian or Tonian origin of animals while unequivocal animal fossils first occur in the Ediacaran.
Carlisle E   +3 more
europepmc   +4 more sources

Increase in metazoan ecosystem engineering prior to the Ediacaran–Cambrian boundary in the Nama Group, Namibia [PDF]

open access: yesRoyal Society Open Science, 2019
The disappearance of the soft-bodied Ediacara biota at the Ediacaran–Cambrian boundary potentially represents the earliest mass extinction of complex life, although the precise driver(s) of this extinction remain unresolved.
Alison T. Cribb   +8 more
doaj   +1 more source

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