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Three-dimensional preservation of algae and animal embryos in a Neoproterozoic phosphorite
Embryos preserved in early cleavage stages indicate that the divergence of lineages leading to bilaterians may have occurred well before their macroscopic traces or body fossils appear in the geological record.
Pulsed oxidation and biological evolution in the Ediacaran Doushantuo Formation
- K. McFadden, Jing Huang, S. Xiao
- Environmental Science, GeographyProceedings of the National Academy of Sciences
- 4 March 2008
High-resolution geochemical data from the fossil-rich Doushantuo Formation in South China are reported that confirm trends from other broadly equivalent sections and highlight key features that have not been observed in most sections or have received little attention.
Stratigraphy and paleogeography of the Ediacaran Doushantuo Formation (ca. 635-551Ma) in South China
MACROSCOPIC CARBONACEOUS COMPRESSIONS IN A TERMINAL PROTEROZOIC SHALE: A SYSTEMATIC REASSESSMENT OF THE MIAOHE BIOTA, SOUTH CHINA
- S. Xiao, Xunlai Yuan, M. Steiner, A. Knoll
- Geography, Environmental ScienceJournal of Paleontology
- 1 March 2002
Abstract Carbonaceous compression fossils in shales of the uppermost Doushantuo Formation (ca. 555–590 Ma) at Miaohe in the Yangtze Gorges area provide a rare Burgess-Shale-type taphonomic window on…
Permineralized fossils from the terminal Proterozoic Doushantuo Formation, south China
Permineralized fossils of the terminal Proterozoic (600-550 Ma) Doushantuo Formation, China, provide an unusually clear window on biological diversity just before the Ediacaran radiation. In the…
New constraints on the ages of Neoproterozoic glaciations in south China
- Chuanming Zhou, R. Tucker, S. Xiao, Z. Peng, Xunlai Yuan, Zhe Chen
- Environmental Science, Geography
- 1 May 2004
The most complete Neoproterozoic successions in south China contain three diamictite intervals in the Changan, Tiesiao, and Nantuo Formations. The youngest and most widespread Nantuo glacial deposit…
An early Ediacaran assemblage of macroscopic and morphologically differentiated eukaryotes
- Xunlai Yuan, Zhe Chen, S. Xiao, Chuanming Zhou, H. Hua
- Geography, Environmental ScienceNature
- 17 February 2011
A diverse assemblage of morphologically differentiated benthic macrofossils that were preserved largely in situ as carbonaceous compressions in black shales of the Ediacaran Lantian Formation suggests that morphological diversification of macroscopic eukaryotes may have occurred in the early Ediacaren Period, and that the redox history of Ediacaru oceans was more complex than previously thought.
On the eve of animal radiation: phylogeny, ecology and evolution of the Ediacara biota.
PHOSPHATIZED ANIMAL EMBRYOS FROM THE NEOPROTEROZOIC DOUSHANTUO FORMATION AT WENG'AN, GUIZHOU, SOUTH CHINA
Phosphorites of the uppermost Neoproterozoic Doushantuo Formation exposed at Weng'an, South China, contain globular microfossils characterized by distinctively sculpted outer coverings and precise patterns of cell division, which support their reinterpretation as the eggs and embryos of early animals.
High CO2 levels in the Proterozoic atmosphere estimated from analyses of individual microfossils
The results indicate that carbon dioxide was an important greenhouse gas during periods of lower solar luminosity, probably dominating over methane after the atmosphere and hydrosphere became pervasively oxygenated between 2 and 2.2 gigayears ago.