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Biologically Induced Initiation of Neoproterozoic Snowball-Earth Events
(Proceedings of the National Academy of Sciences, 2011)
The glaciations of the Neoproterozoic Era (1,000 to 542 MyBP) were preceded by dramatically light C isotopic excursions preserved in preglacial deposits. Standard explanations of these excursions involve remineralization ...
Grazers and Phytoplankton Growth in the Oceans: an Experimental and Evolutionary Perspective
(Public Library of Science, 2013)
The taxonomic composition of phytoplankton responsible for primary production on continental shelves has changed episodically through Earth history. Geological correlations suggest that major changes in phytoplankton ...
Systems paleobiology
(Geological Society of America, 2013)
Systems paleobiology seeks to interpret the history of life within the framework of Earth’s environmental history, using physiology as the conceptual bridge between paleontological and geochemical data sets. In some cases, ...
Opportunity Mars Rover mission: Overview and selected results from Purgatory ripple to traverses to Endeavour crater
(Wiley-Blackwell, 2011)
[1] Opportunity has been traversing the Meridiani plains since 25 January 2004 (sol 1), acquiring numerous observations of the atmosphere, soils, and rocks. This paper provides an overview of key discoveries between sols ...
Skeletons and Ocean Chemistry: The Long View
(Oxford University Press, 2011)
Ancient Aqueous Environments at Endeavour Crater, Mars
(American Association for the Advancement of Science (AAAS), 2014)
Opportunity has investigated in detail rocks on the rim of the Noachian age Endeavour crater, where orbital spectral reflectance signatures indicate the presence of Fe+3-rich smectites. The signatures are associated with ...
A Basin Redox Transect at the Dawn of Animal Life
(Elsevier BV, 2013)
Multiple eukaryotic clades make their first appearance in the fossil record between ~810 and 715 Ma. Molecular clock studies suggest that the origin of animal multicellularity may have been part of this broader eukaryotic ...
Geobiology of a Lower Cambrian Carbonate Platform, Pedroche Formation, Ossa Morena Zone, Spain
(Elsevier BV, 2013)
The Cambrian Pedroche Formation comprises a mixed siliciclastic–carbonate succession recording subtidal deposition on a marine platform. Carbonate carbon isotope chemostratigraphy confirms previous biostratigraphic assignment ...
Microstructures in Metasedimentary Rocks from the Neoproterozoic Bonahaven Formation, Scotland: Microconcretions, Impact Spherules, or Microfossils?
(Elsevier BV, 2013)
Microscopic spherules in relatively undeformed mudstones of the Neoproterozoic Bonahaven Formation, Islay, Scotland, are differentiated from their matrix by a sharp micron-scale, smoothly rounded boundary. These elongate ...
The Meaning of Stromatolites
(Annual Reviews, 2013)
Stromatolites document microbial interactions with sediments and flowing water throughout recorded Earth history and have the potential to illuminate the long-term history of life and environments. Modern stromatolites, ...