Results 141 to 150 of about 2,007 (165)
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Neoproterozoic timescales and stratigraphy
Geological Society, London, Special Publications, 2009Abstract The Infracambrian is a term for mostly Neoproterozoic successions in North Africa and areas to the east. Its base lies within the middle Neoproterozoic period, or Cryogenian, includes the youngest Neoproterozoic period, or Ediacaran, and continues into the early Cambrian to the level at which trilobites first appear.
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Toward a Neoproterozoic composite carbon-isotope record
Geological Society of America Bulletin, 2005Glacial deposits of Sturtian and Marinoan age occur in the well-studied Neoproterozoic successions of northern Namibia, South Australia, and northwestern Canada. In all three regions, the Marinoan glaciation is presaged by a large negative δ 13 C anomaly, and the cap carbonates to both glacial units share a suite of unique sedimentological ...
Halverson, G. +4 more
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Neoproterozoic Acritarch Biostratigraphy of China
2020According to studies of the acritarch biostratigraphy in China, the evolution of Neoproterozoic acritarchs roughly involves four stages, from older to younger, including the pre-Doushantuo Stage, the Doushantuo Stage, the Denying Stage and the Meishucun Stage.
Yin Leiming, Yin Chongyu
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Neoproterozoic tectonic synthesis of Uruguay
International Geology Review, 2010Neoproterozoic–lower Palaeozoic successions in the Brasiliano fold belts are described and a brief synthesis of these terranes is presented in order to erect a tectonic framework for this region. Tectonic events that occurred around the Rio de La Plata craton were diachronous and reflected successive stages of the Brasiliano orogenic cycle.
Leda Sánchez Bettucci +2 more
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Chapter 9.1 Neoproterozoic Acritarch Evolution
2009Acritarchs are key for unravelling Neoproterozoic biodiversity changes because they represent the only fossil group occurring throughout the era. Their Neoproterozoic evolution is characterised by drastic diversity changes, which, coupled to the occurrence of taxa with restricted stratigraphic range, represents a powerful biostratigraphic tool for the ...
Claudio Gaucher, Peter Sprechmann
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Neoproterozoic Geobiology and Paleobiology
2006Chapter 1: The Proterozoic Fossil Record of Heterotrophic Eukaryotes Sussannah M. Porter 1. Introduction 2. Eukaryotic Tree 3. Fossil Evidence for Proterozoic Heterotrophs 4. Why Are Heterotrophs Rare in Proterozoic Rocks? 5. Conclusions Chapter 2: On the Morphological History of Proterozoic and Cambrian Acritarchs John Warren Huntley, Shuhai Xiao, and
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NEOPROTEROZOIC GLOBAL PALEOGEOGRAPHY REVISITED
Geological Society of America Abstracts with Programs, 2019Zheng-Xiang Li +4 more
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