Results 31 to 40 of about 12,978 (245)

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

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

open access: yesGeobiology, 2023
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 ...
A. Cribb   +4 more
semanticscholar   +1 more source

Mineralogy, petrography, geochemistry of magnetite ore and sulfide minerals and the possible model of mineralization at Anomaly#3, Gol-e-Gohar, iron mine, Sirjan, Kerman [PDF]

open access: yesپترولوژی, 2019
The Gol-e-Gohar anomaly#3 of Sirjan was initially formed by synchronous submarine basaltic volcanism and sedimentary rocks (basalt, shale, carbonates, sandstone, marl, chert-iron hydroxide-oxides) during Neoproterozoic (Ediacaran) and subsequently ...
Moslem Badavi   +2 more
doaj   +1 more source

Combined Magnetostratigraphy From Three Localities of the Rainstorm Member of the Johnnie Formation in California and Nevada, United States Calibrated by Cyclostratigraphy: A 13 R/Ma Reversal Frequency for the Ediacaran

open access: yesFrontiers in Earth Science, 2021
A combined magnetostratigraphy for the Rainstorm Member of the Ediacaran Johnnie Formation was constructed using the sediment accumulation rates determined by rock magnetic cyclostratigraphy for three localities of the Rainstorm Member to provide a high ...
Kenneth P. Kodama
doaj   +1 more source

Vanadium isotope evidence for widespread marine oxygenation from the late Ediacaran to early Cambrian

open access: yesEarth and Planetary Science Letters, 2023
25 Early animals experienced multiple-phase radiations and extinctions from the late 26 Ediacaran to the Early Cambrian. Oxygen likely played an important role in these 27 evolutionary events, but detailed marine redox evolution during this period ...
Wei Wei   +7 more
semanticscholar   +1 more source

atcribb/Ediacaran-Cambrian-OPD-Controls: Initial-Submission-2

open access: yes, 2022
This release contains the code for the submission of the article "Ediacaran-Cambrian bioturbators did not oxygenate sediments in shallow marine ...
Alison Cribb
core   +1 more source

Enduring evolutionary embellishment of cloudinids in the Cambrian

open access: yesRoyal Society Open Science, 2021
The Ediacaran–Cambrian transition and the following Cambrian Explosion are among the most fundamental events in the evolutionary history of animals. Understanding these events is enhanced when phylogenetic linkages can be established among animal fossils
Tae-Yoon S. Park   +7 more
doaj   +1 more source

A crown-group cnidarian from the Ediacaran of Charnwood Forest, UK

open access: yesNature Ecology & Evolution, 2022
Cnidarians are a disparate and ancient phylum, encompassing corals and jellyfish, and occupy both the pelagic and benthic realms. They have a rich fossil record from the Phanerozoic eon lending insight into the early history of the group but, although ...
F. Dunn   +5 more
semanticscholar   +1 more source

Calibrating the temporal and spatial dynamics of the Ediacaran - Cambrian radiation of animals

open access: yesEarth-Science Reviews, 2021
The Ediacaran-Cambrian transition, which incorporates the radiation of animals, lacks a robust global temporal and spatial framework, resulting in major uncertainty in the evolutionary dynamics of this critical radiation and its relationship to changes ...
F. Bowyer   +9 more
semanticscholar   +1 more source

Affinity of Ediacaran skeletal fauna and their environmental context [PDF]

open access: yes, 2022
The Ediacaran-Cambrian boundary (~541 million years ago (Ma)) signifies the start of the ‘Cambrian Explosion’ of animals, and by 520 Ma most major phyla had emerged.
Shore, Amy J.
core   +1 more source

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