Results 61 to 70 of about 684 (155)
Ichnological evidence for meiofaunal bilaterians from the terminal Ediacaran and earliest Cambrian of Brazil [PDF]
The evolutionary events during the Ediacaran–Cambrian transition (~541 Myr ago) are unparalleled in Earth history. The fossil record suggests that most extant animal phyla appeared in a geologically brief interval, with the oldest unequivocal bilaterian ...
Boggiani, Paulo C. +11 more
core +1 more source
Brazilian Journal of Geology: Sedimentary rocks of the Sete Lagoas Formation, exposed in the left margin of the São Francisco river (Minas Gerais State, Brazil), were deposited on the Januária-Itacarambi basement high.
Pascoal Perrella Júnior +5 more
doaj +1 more source
Depositional facies and platform architecture of microbialite-dominated carbonate reservoirs, Ediacaran–Cambrian Ara Group, Sultanate of Oman [PDF]
, 2014 Intrasalt carbonates of the Ediacaran–Cambrian Ara Group constitute a significant reservoir element of the intrasalt “stringer” play in Oman, in which dolomitic carbonates are encased in salt at depths of 3 to 7 km (1.9 to 4.3 mi).
Al-Rawahi, Zuwaina, Grotzinger, John
core
The importance of Nama Group sediments and fossils to the debate about animal origins [PDF]
, 1997 Main articleThe purpose of this review is to draw attention to the contribution that Nama sediments and fossils have made, and potentially can make, to the ongoing debate about metazoan origins.
Brain, C. K.
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Role of low intensity environmental disturbance in structuring the earliest (Ediacaran) macrobenthic tiered communities [PDF]
Rangeomorphs were important components of Ediacaran macrobenthic ecosystems, yet their biology and ecology remain poorly constrained. They formed high-density, tiered communities that were subjected to intermittent burial events, the largest of which ...
Kenchington, C. G. +2 more
core +1 more source
Sedimentary provenance in the southern sector of the São Francisco Basin, SE Brazil
Brazilian Journal of Geology: We present new Sm-Nd, U-Pb and Hf isotope geochronological data for the siliciclastic rocks in the southern sector of the São Francisco Basin. An abrupt change in the Sm-Nd data is observed from the Carrancas Formation’s oligomitic conglomerates (TDM ...
Gustavo Macedo de Paula-Santos +1 more
doaj +1 more source
Eukaryotic Organisms in Proterozoic Oceans [PDF]
, 2010 The geological record of protists begins well before the Ediacaran and Cambrian diversification of animals, but the antiquity of that history, its reliability as a chronicle of evolution and the causal inferences that can be drawn from it remain subjects
Cohen, Phoebe A +3 more
core +1 more source
, 2005 24 páginas, 43 fotos.-- En: Muñoz Barco, P. & Martínez Flores, E.
Gutiérrez-Marco, J. C. +4 more
core
Multiple branching and attachment structures in cloudinomorphs, Nama Group, Namibia [PDF]
, 2020 The Ediacaran-Cambrian cloudinomorphs, which include Cloudina, are the first putative skeletal metazoans. They have a benthic ecology and tubular, organic, or biomineralized stacked funnel morphologies but an unresolved phylogenetic affinity.
Amy Shore +28 more
core +2 more sources
Geologia USP. Série Científica, 2013 O Período Ediacarano marca o aparecimento dos primeiros organismos macroscópicos complexos no registro fóssil. Evidências atuais indicam que a biota de Ediacara é composta tanto por animais quanto por grupos de protistas gigantes extintos, além de algas ...
Bruno Becker Kerber +4 more
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