Results 71 to 80 of about 1,401 (174)

Evolution: The Making of Ediacaran Giants [PDF]

Current Biology, 2014
Some of the enigmatic Precambrian organisms in the Ediacaran Period grew large and stood tall above the seafloor. Canopy flow modeling suggests that their large size was optimized for access to flow in order to facilitate osmotrophic nutrient uptake in low-flow environments.
openaire   +2 more sources

Chronology of Ediacaran sedimentary and biogeochemical shifts along eastern Gondwanan margins

Communications Earth & Environment
Determining causal relationships between environmental change and early animal evolution has been limited by our lack of a robust temporal framework for the Ediacaran Period (635-539 million years ago).
Marjorie D. Cantine, Alan D. Rooney, Andrew H. Knoll, Irene Gómez-Pérez, Badar al Baloushi, Kristin D. Bergmann   +5 more
doaj   +1 more source

Rheotropic Epifaunal Growth, Not Felling by Density Currents, Is Responsible for Many Ediacaran Fossil Orientations at Mistaken Point

Frontiers in Earth Science, 2022
D. McIlroy, D. Pérez-Pinedo, G. Pasinetti, C. McKean, R. S. Taylor, R. N. Hiscott   +5 more
doaj   +1 more source

Ediacaran and Anthropocene

, 2012
Two new developments in the taxonomy of temporality provide the focus for this discussion. One is the official recognition of a new, and very old, geologic period, the Ediacaran, now understood to occupy the stretch of deep time between 575 and 542 million years ago, directly preceding the Cambrian, with its remarkable radiation of life forms.
openaire   +1 more source

Ecological interactions in Cloudina from the Ediacaran of Brazil: implications for the rise of animal biomineralization

Scientific Reports, 2017
At the Ediacaran/Cambrian boundary, ecosystems witnessed an unparalleled biological innovation: the appearance of shelled animals. Here, we report new paleoecological and paleobiological data on Cloudina, which was one of the most abundant shelled ...
Bruno Becker-Kerber, Mírian Liza Alves Forancelli Pacheco, Isaac Daniel Rudnitzki, Douglas Galante, Fabio Rodrigues, Juliana de Moraes Leme   +5 more
doaj   +1 more source

Ediacarans [PDF]

Current Biology, 2005
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Upwelling-driven high organic production in the late Ediacaran

Communications Earth & Environment
The Ediacaran ocean (635-541 million years ago) is typically viewed as a stagnant, redox-stratified ocean with low phosphorus availability. However, this contradicts the high total organic carbon (up to 15 wt%) recorded in the upper Ediacaran Doushantuo ...
Fuencisla Cañadas, Dominic Papineau, Thomas J. Algeo, Chao Li   +3 more
doaj   +1 more source

Resúmenes cortos presentados en el Congreso Internacional sobre el Ediacárico y el tránsito Ediacárico-Cámbrico (Guadalupe, Extremadura, España, 17 al 24 de Octubre de 2019)

Estudios Geologicos, 2019
El siguiente documento recopila los resúmenes cortos presentados en el IMECT (International Meeting on the Ediacaran System and the Ediacaran-Cambrian Transition), celebrado del 17 al 24 de octubre de 2019 en Guadalupe (Geoparque Villuercas-Ibores-Jara).
J. J. Álvaro, S. Jensen
doaj  

Volcano-hydrothermal phosphorus pulses fostered ocean oxidation during Ediacaran phosphogenesis in South China

Communications Earth & Environment
Phosphorus availability limits marine productivity and influences ocean oxygenation, yet the mechanisms driving phosphorus enrichment in Ediacaran oceans remain uncertain.
Chao Han, Qiang Li, Yu Han, Xiaolin Du, Shourui Dai   +4 more
doaj   +1 more source

Ediacaran complex acanthomorphic acritarch assemblage from the Owk Shale of the Kurnool Group: Morphological insights through Confocal Laser Scanning Microscope

Journal of the Palaeontological Society of India
The Organic-Walled Microfossils (OWM), especially acritarchs, are essential in understanding eukaryotes’ early evolution and diversification in the Proterozoic Era.
YOGESH KUMAR, MUKUND SHARMA, SHREERUP GOSWAMI, VEERU KANT SINGH   +3 more
doaj   +1 more source