Results 91 to 100 of about 12,978 (245)

Authigenic clay mineral evidence for restricted, evaporitic conditions during the emergence of the Ediacaran Doushantuo Biota

Communications Earth & Environment, 2022
The Ediacaran Period witnessed major environmental change and an expansion of eukaryotic life following the Marinoan glaciation. The Doushantuo Formation of south China has furnished much of our understanding of Earth System and biosphere evolution ...
Shujun Han, S. Löhr, April N. Abbott, A. Baldermann, M. Voigt, Bingsong Yu   +5 more
semanticscholar   +1 more source

On the coevolution of Ediacaran oceans and animals [PDF]

Proceedings of the National Academy of Sciences, 2008
Fe speciation and S-isotope of pyrite data from the terminal Proterozoic Sheepbed Formation in Canada and Doushantuo Formation in China reveal that ocean deep waters were anoxic after the global glaciations (snowball Earth) ending 635 million years ago, but that marine sulfate concentrations and inferentially atmospheric oxygen levels were higher than ...
Yanan, Shen, Tonggang, Zhang, Paul F, Hoffman   +2 more
openaire   +2 more sources

A putative triradial macrofossil from the Ediacaran Jiangchuan Biota

iScience
Summary: The late Ediacaran Jiangchuan biota, from the Dengying Formation in eastern Yunnan, is well-known for its diverse macroalgal fossils, opening a window onto eukaryotic-dominated ecosystems from the late Neoproterozoic of South China.
Mingsheng Zhao, Giovanni Mussini, Yulan Li, Feng Tang, Patricia Vickers-Rich, Ming Li, Ailin Chen   +6 more
doaj   +1 more source

Strontium isotope and element constraints on the paleoenvironment of the latest Ediacaran in the Sichuan Basin, southeastern Tibetan Plateau

Frontiers in Earth Science, 2022
The Ediacaran–Cambrian period witnessed episodic extinctions, oxygenation of seawaters, Cambrian explosions, and tectonic events. However, compared with the various high-resolution geochemical records of the early–middle Ediacaran and Cambrian, the ...
Xiaojun Zhang, Xiaojun Zhang, Gang Zhou, Pengyuan Zhang, Yuan He, Zhifu Wei, Gen Wang, Ting Zhang, Wei He, He Ma, Chenxi Zhu, Jingyi Wei, Xueyun Ma, Xiaoli Yu, Shangkun Li, Lun Li, Yongli Wang   +16 more
doaj   +1 more source

Review of the Ediacaran-Lower Ordovician (pre-Sardic) stratigraphic framework of the Eastern Pyrenees, southwestern Europe

Geologica Acta, 2018
The Ediacaran-Lower Ordovician successions exposed in the Eastern Pyrenees are updated and revised based on recent U-Pb zircon radiometric ages, intertonguing relationships of carbonate-dominated strata, and onlapping patterns marking the top of volcano ...
M. Padel, S. Clausen, J. J. Álvaro, J.M. Casas   +3 more
doaj   +3 more sources

Ediacaran survivors in the Cambrian: suspicions, denials and a smoking gun

Geological Magazine, 2022
The relative timing of extinctions and originations is a foundation for reconstructing evolutionary causes. However, there has been a tendency to dismiss reported Ediacaran holdovers in favour of effective extinction around the Cambrian boundary.
Jennifer F. Hoyal Cuthill
semanticscholar   +1 more source

A movable beast: glaciation in the Ediacaran

National Science Review, 2023
<p>Ediacaran time (635–543 million years ago [Ma]) represents the dawn of macroscopic life following two Neoproterozoic Snowball Earth episodes [<span></span><a>1</a>], where a runaway ice-albedo effect caused the entire planet to become engulfed in ice [<span></span><a>2</a>,<span>< ...
openaire   +2 more sources

Ediacaran reorganization of the marine phosphorus cycle

Proceedings of the National Academy of Sciences of the United States of America, 2020
Significance The evolution of macroscopic animals in the latest Proterozoic Eon is associated with many changes in the geochemical environment, but the sequence of cause and effect remains a topic of intense research and debate. In this study, we use two
T. Laakso, E. Sperling, D. Johnston, A. Knoll   +3 more
semanticscholar   +1 more source

An Ediacaran Metasedimentary Fragment With Northern Gondwana Affinity in the Southern East Kunlun Accretionary Belt, Northern Tibetan Plateau: Implications for the Dispersal of Peri‐Gondwanan Terranes

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 10, October 2026.
Abstract Precambrian supercontinent reconstructions largely rely on robust geological constraints. Among these, the basin affinities recorded by Precambrian sedimentary fragments preserved in orogenic belts provide critical evidence for resolving the paleogeographic configurations of microcontinents and continental blocks.
Yongcheng Li, Bo Hui, Yunpeng Dong, Dengfeng He, Shengsi Sun, Zhidong Gu, Cuicui Wang, Talifeng Biedilihan, M. P. Manu Prasanth, Xin Zhu, Shuxuan Yan, Rutao Zang, Lutong Zhao, Zihao Liu, Mohamed Attia   +14 more
wiley   +1 more source

Protoconodont fossils for refining the Cambrian bottom and the contribution to shale gas formation along the southwest margin of Yangtze Block

China Geology, 2020
: It has been an intense debate on the exact boundary between Ediacaran and Cambrian in the southwest Yangtze Block. The calibration of this critical boundary has a remarkable influence on the further investigation of the break-up of the Rodinia ...
Jun-ping Liu, Si-cun Song, Wei Wang, Feng Tang, Jing Li, Xiang-dong Duan, Xiao-hu Wang, Bai-dong Sun, Sai-ying Yu, Shao-bin Hu, Wen-ting Duan   +10 more
doaj   +1 more source