Results 121 to 130 of about 14,980 (261)

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

Massive formation of early diagenetic dolomite in the Ediacaran ocean: Constraints on the “dolomite problem” [PDF]

, 2020
Biao Chang, Chao Li, Deng Liu, Ian Foster, Aradhna Tripati, Max K. Lloyd, Ingrid Maradiaga, Genming Luo, Zhihui An, Zhenbing She, Shucheng Xie, Jinnan Tong, Junhua Huang, Thomas J. Algeo, Timothy W. Lyons, Adrian Immenhauser   +15 more
openalex   +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

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  

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

Ediacaran to lower Cambrian basement in eastern George V Land (Antarctica): Evidence from U Pb dating of gneiss xenoliths and implications for the South Australia- East Antarctica connection [PDF]

, 2018
Gaëlle Lamarque, Jérôme Bascou, René‐Pierre Ménot, Jean‐Louis Paquette, Simon Couzinié, Yann Rolland, Jean-Yves Cottin   +6 more
openalex   +1 more source

A >70‐Myr‐Long Geomagnetic Field Reversal Hyperactivity Across the Ediacaran‐Cambrian Transition

Geophysical Research Letters
The long‐term variation of the geomagnetic field is a key constraint for unraveling the geodynamo processes and the evolution of Earth's deep interior.
Fuyun Shen, Bin Wen, Phil J. A. McCausland, Zheng Gong, Zongmin Zhu, Fangzheng Liu, Jingyi Wang   +6 more
doaj   +1 more source

High frequency cyclicity and chemostratigraphy of the Tagatiya Guazu Formation, Itapucumi Group, Paraguay: evidence of the Ediacaran-Cambrian transition

, 2022
Gabriel Correa Antunes
openalex   +1 more source

Diverse Assemblage of Ediacaran fossils from Central Iran [PDF]

, 2018
Seyed Hamid Vaziri, Mahmoud Reza Majidifard, Marc Laflamme   +2 more
openalex   +1 more source

Enhanced phosphorus regeneration linked to Ediacaran ocean oxygenation

Communications Earth & Environment
Several pulses of ocean oxygenation events were recognized in the Ediacaran period. However, the intrinsic triggers behind them remain ambiguous. Here we report phosphorus speciation data from the Ediacaran Doushantuo Formation, South China, to elucidate
Dongtao Xu, Xinqiang Wang, Eva E. Stüeken, Weiming Xu, Zheng Qin, Jihua Hao, Xiaoying Shi, Dongjie Tang   +7 more
doaj   +1 more source