Results 61 to 70 of about 12,978 (245)

Paleontology and ichnology of the late Ediacaran Nasep–Huns transition (Nama Group, southern Namibia)

Journal of Paleontology, 2022
. The Nasep and Huns members of the Urusis Formation (Nama Group), southern Namibia, preserve some of the most diverse trace-fossil assemblages known from the latest Ediacaran worldwide, including potentially the world's oldest “complex” vertical ...
Katherine A. Turk, Katie M. Maloney, M. Laflamme, S. Darroch   +3 more
semanticscholar   +1 more source

New palaeodirections and palaeointensity data from extensive profiles through the Ediacaran section of the Volyn Basalt Province (NW-Ukraine)

Geophysical Journal International, 2022
Changes of the geomagnetic field over geologic time scales can be used to study the evolution and processes of its sources in Earth's deep interior.
D. Thallner, V. Shcherbakova, V. Bakhmutov, V. Shcherbakov, G. Zhidkov, I. Poliachenko, A. Biggin   +6 more
semanticscholar   +1 more source

Near-collapse of the geomagnetic field may have contributed to atmospheric oxygenation and animal radiation in the Ediacaran Period

Communications Earth & Environment
Earth’s magnetic field was in a highly unusual state when macroscopic animals of the Ediacara Fauna diversified and thrived. Any connection between these events is tantalizing but unclear. Here, we present single crystal paleointensity data from 2054 and
Wen-Tao Huang, J. Tarduno, Tinghong Zhou, M. Ibáñez-Mejia, Laércio Dal Olmo-Barbosa, Edinei Koester, E. Blackman, A. V. Smirnov, Gabriel Ahrendt, R. Cottrell, Kenneth P. Kodama, R. Bono, D. Sibeck, Yong-Xiang Li, F. Nimmo, Shuhai Xiao, M. Watkeys   +16 more
semanticscholar   +1 more source

A New Conulariid (Cnidaria, Scyphozoa) From the Terminal Ediacaran of Brazil

Frontiers in Earth Science, 2022
Paraconularia ediacara n. sp., the oldest documented conulariid cnidarian, is described based on a compressed thin specimen from the terminal Ediacaran Tamengo Formation near Corumbá, Mato Grosso do Sul State, Brazil.
J. Leme, H. Van Iten, M. Simões
semanticscholar   +1 more source

Ediacaran oxidation and biotic evolution [PDF]

Nature, 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
openaire   +2 more sources

Filamentous Connections between Ediacaran Fronds [PDF]

Current Biology, 2020
Fossils of the Ediacaran macrobiota (∼571-539 mya) record phylogenetically diverse marine palaeocommunities, including early animals, which pre-date the "Cambrian Explosion" [1-4]. Benthic forms with a frondose gross morphology, assigned to the morphogroups Rangeomorpha [5] and Frondomorpha (see also Arboreomorpha) [6-8], are among the most temporally ...
Liu, Alexander G, Dunn, Frances S
openaire   +5 more sources

Dendrogramma, new Genus, with two new non- bilaterian species from the Marine Bathyal of Southeastern Australia (Animalia, Metazoa incertae sedis) – with similarities to some medusoids from the precambrian ediacara [PDF]

, 2014
This study examines a new species of dinosaur named Dendrogramma, which has been found near Bass Strait. Abstract A new genus, Dendrogramma, with two new species of multicellular, non-bilaterian, mesogleal animals with some bilateral aspects, D ...
Jean Just, Jorgen Olesen, Reinhardt Mobjerg Kristensen, Olesen, Jørgen, Just, Jean, Kristensen, Reinhardt Møbjerg   +5 more
core   +1 more source

A late-Ediacaran crown-group sponge animal

Nature
Sponges are the most basal metazoan phylum1 and may have played important roles in modulating the redox architecture of Neoproterozoic oceans2. Although molecular clocks predict that sponges diverged in the Neoproterozoic era3,4, their fossils have not ...
Xiao-Peng Wang, Alexander G. Liu, Zhe Chen, Cheng-Xi Wu, Ya-Rong Liu, B. Wan, K. Pang, Chuan-Ming Zhou, Xun-Lai Yuan, Shuhai Xiao   +9 more
semanticscholar   +1 more source

Hydrocarbon expulsion model and resource potential evaluation of high-maturity marine source rocks in deep basins: Example from the Ediacaran microbial dolomite in the Sichuan Basin, China

Petroleum Science, 2022
Hydrocarbon expulsion features and resource potential evaluation of source rocks are crucial for the petroleum exploration. High-maturity marine source rocks have not exhibited a hydrocarbon expulsion mode owing to the lack of low-maturity source rocks ...
Wen-Yang Wang, X. Pang, Yaping Wang, Zhang-Xin Chen, Changrong Li, Xinhua Ma   +5 more
semanticscholar   +1 more source

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

Proceedings of the National Academy of Sciences of the United States of America, 2020
Significance Massive Paleozoic and Precambrian dolostone successions have long puzzled geologists in light of the kinetic barriers that inhibit low-temperature dolomite nucleation and precipitation (i.e., the “dolomite problem”).
Biao Chang, Chao Li, Deng Liu, I. Foster, A. Tripati, M. Lloyd, I. Maradiaga, G. Luo, Z. An, Zhenbing She, Shucheng Xie, J. Tong, Junhua Huang, T. Algeo, T. Lyons, A. Immenhauser   +15 more
semanticscholar   +1 more source