Results 81 to 90 of about 11,063 (154)
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 +5 more
doaj +1 more source
Developing proxies to constrain redox gradients in terminal Ediacaran oceans [PDF]
, 2015 There is a long-standing interest in the relationship between the rise of early Metazoans and changes in the redox structure of the oceans. As such, there is a need for reliable geochemical proxy archives that record palaeo-redox.
Tostevin, R
core
In silico transitions to multicellularity
, 2014 The emergence of multicellularity and developmental programs are among the major problems of evolutionary biology. Traditionally, research in this area has been based on the combination of data analysis and experimental work on one hand and theoretical ...
Duran-Nebreda, Salva, Solé, Ricard V.
core +1 more source
Sedimentary provenance of siliciclastic rocks from the Lalla Mouchaa Calcschists Formation (Coastal Block, Western Rehamna): Evidence of denudation of ca. 2 Ga basement in the Moroccan Meseta. [PDF]
, 2018 Paleoproterozoic basement rocks (ca. 2Ga) are scarce along the European and North African Paleozoic mountain chains (Fig.1a). In Morocco, ca. 2.2-2Ga granitic rocks (Gasquet et al., 2008; Kouyaté et al., 2013) have been exclusively reported in the ...
El Attari, A. +8 more
core
Discovery Of Bilaterian-Type Through-Guts In Cloudinomorphs From The Terminal Ediacaran Period [PDF]
, 2020 Cai, Y. +7 more
core +4 more sources
Upwelling-driven high organic production in the late Ediacaran
Communications Earth & EnvironmentThe 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 +3 more
doaj +1 more source
Provenance of Cambro-Ordovician siliciclastic rocks of the SW Iberia: insights to the evolution of North Gondwana margin. [PDF]
, 2013 This study makes a comparison between the populations of detrital zircon of the Cambrian sandstones from the Ossa-Morena Zone (OMZ) and the Ordovician quartzites from the southern domains of the Central Iberian Zone (S-CIZ) in order to identify the ...
Chichorro, Martim +7 more
core
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
A >70‐Myr‐Long Geomagnetic Field Reversal Hyperactivity Across the Ediacaran‐Cambrian Transition
Geophysical Research LettersThe 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 +6 more
doaj +1 more source