Published in Proc Natl Acad Sci U S A on June 24, 1997
Dynamics of the Neoproterozoic carbon cycle. Proc Natl Acad Sci U S A (2003) 2.34
Biologically induced initiation of Neoproterozoic snowball-Earth events. Proc Natl Acad Sci U S A (2011) 1.08
Uncovering the Neoproterozoic carbon cycle. Nature (2012) 0.96
On the coevolution of Ediacaran oceans and animals. Proc Natl Acad Sci U S A (2008) 0.89
Arsenic stress after the Proterozoic glaciations. Sci Rep (2015) 0.78
A complex microbiota from snowball Earth times: microfossils from the Neoproterozoic Kingston Peak Formation, Death Valley, USA. Proc Natl Acad Sci U S A (2003) 0.76
Late Proterozoic rise in atmospheric oxygen concentration inferred from phylogenetic and sulphur-isotope studies. Nature (1996) 2.26
Comparative Earth history and Late Permian mass extinction. Science (1996) 2.25
Fractionation of carbon isotopes by phytoplankton and estimates of ancient CO2 levels. Global Biogeochem Cycles (1992) 1.96
Secular variation in carbon isotope ratios from Upper Proterozoic successions of Svalbard and East Greenland. Nature (1986) 1.42
Integrated chemostratigraphy and biostratigraphy of the Windermere Supergroup, northwestern Canada: implications for Neoproterozoic correlations and the early evolution of animals. Geol Soc Am Bull (1994) 1.39
Carbon isotope evidence for the stepwise oxidation of the Proterozoic environment Nature (1992) 1.32
Latitudinal variations in plankton delta 13C: implications for CO2 and productivity in past oceans. Nature (1989) 1.22
Biostratigraphic and chemostratigraphic correlation of Neoproterozoic sedimentary successions: upper Tindir Group, northwestern Canada, as a test case. Geology (1992) 1.14
A paleoweathering profile from Griqualand West, South Africa: evidence for a dramatic rise in atmospheric oxygen between 2.2 and 1.9 bybp. Am J Sci (1990) 1.09
Anomalous carbonate precipitates: is the Precambrian the key to the Permian? Palaios (1995) 0.92
Isotopic compositions of carbonates and organic carbon from upper Proterozoic successions in Namibia: stratigraphic variation and the effects of diagenesis and metamorphism. Precambrian Res (1991) 0.90
Neoproterozoic variations in the C-isotopic composition of seawater: stratigraphic and biogeochemical implications. Precambrian Res (1995) 0.87
Carbonate deposition during the late Proterozoic Era: an example from Spitsbergen. Am J Sci (1990) 0.84
The post-Paleozoic chronology and mechanism of 13C depletion in primary marine organic matter. Am J Sci (1989) 0.82
Tectonic control of the crustal organic carbon reservoir during the Precambrian. Chem Geol (1994) 0.81
Proterozoic ocean chemistry and evolution: a bioinorganic bridge? Science (2002) 4.19
The biotic crisis and the future of evolution. Proc Natl Acad Sci U S A (2001) 2.43
Stromatolites in Precambrian carbonates: evolutionary mileposts or environmental dipsticks? Annu Rev Earth Planet Sci (1999) 1.97
Morphological and ecological complexity in early eukaryotic ecosystems. Nature (2001) 1.76
Anoxygenic photosynthesis modulated Proterozoic oxygen and sustained Earth's middle age. Proc Natl Acad Sci U S A (2009) 1.58
Exploration of Victoria crater by the Mars rover Opportunity. Science (2009) 1.56
Calibrating rates of early Cambrian evolution. Science (1993) 1.46
In situ evidence for an ancient aqueous environment at Meridiani Planum, Mars. Science (2004) 1.39
Integrated chemostratigraphy and biostratigraphy of the Windermere Supergroup, northwestern Canada: implications for Neoproterozoic correlations and the early evolution of animals. Geol Soc Am Bull (1994) 1.39
Chemostratigraphy of predominantly siliciclastic Neoproterozoic successions: a case study of the Pocatello Formation and Lower Brigham Group, Idaho, USA Geol Mag (1994) 1.38
Fossil preservation in the Neoproterozoic Doushantuo phosphorite Lagerstatte, South China. Lethaia (1999) 1.33
A bangiophyte red alga from the Proterozoic of arctic Canada. Science (1990) 1.19
Eumetazoan fossils in terminal proterozoic phosphorites? Proc Natl Acad Sci U S A (2000) 1.16
Biostratigraphic and chemostratigraphic correlation of Neoproterozoic sedimentary successions: upper Tindir Group, northwestern Canada, as a test case. Geology (1992) 1.14
Mesoproterozoic Archaeoellipsoides: akinetes of heterocystous cyanobacteria. Lethaia (1995) 1.08
Secular change in chert distribution: a reflection of evolving biological participation in the silica cycle. Palaios (1989) 1.04
Ancient aqueous environments at Endeavour crater, Mars. Science (2014) 1.03
The Opportunity Rover's Athena science investigation at Meridiani Planum, Mars. Science (2004) 1.03
A Vendian-Cambrian boundary succession from the northwestern margin of the Siberian Platform: stratigraphy, palaeontology, chemostratigraphy and correlation. Geol Mag (1998) 1.02
Chuar Group of the Grand Canyon: record of breakup of Rodinia, associated change in the global carbon cycle, and ecosystem expansion by 740 Ma. Geology (2000) 0.99
Did sulfate availability facilitate the evolutionary expansion of chlorophyll a+c phytoplankton in the oceans? Geobiology (2011) 0.96
Ancient impact and aqueous processes at Endeavour Crater, Mars. Science (2012) 0.95
Anomalous carbonate precipitates: is the Precambrian the key to the Permian? Palaios (1995) 0.92
Redox heterogeneity of subsurface waters in the Mesoproterozoic ocean. Geobiology (2014) 0.91
Archean microfossils showing cell division from the swaziland system of South Africa. Science (1977) 0.90
Isotopic compositions of carbonates and organic carbon from upper Proterozoic successions in Namibia: stratigraphic variation and the effects of diagenesis and metamorphism. Precambrian Res (1991) 0.90
Sterols in red and green algae: quantification, phylogeny, and relevance for the interpretation of geologic steranes. Geobiology (2008) 0.88
Neoproterozoic variations in the C-isotopic composition of seawater: stratigraphic and biogeochemical implications. Precambrian Res (1995) 0.87
Acritarchs and microfossils from the Mesoproterozoic Bangemall Group, northwestern Australia. J Paleontol (1999) 0.86
Sr isotopic variations in Upper Proterozoic carbonates from Svalbard and East Greenland. Geochim Cosmochim Acta (1989) 0.85
Ediacaran (precambrian) fossils from the wernecke mountains, northwestern Canada. Science (1983) 0.82
Microfossils from oolites and pisolites of the Upper Proterozoic Eleonore Bay Group, Central East Greenland. J Paleontol (1988) 0.82
Phanerozoic land-plant diversity in north america. Science (1979) 0.82
Exceptional preservation of fossils in an Upper Proterozoic shale. Nature (1988) 0.82
Two years at Meridiani Planum: results from the Opportunity Rover. Science (2006) 0.81
Archean photoautotrophy: some alternatives and limits. Orig Life (1979) 0.81
Paleobiology of distinctive benthic microfossils from the upper Proterozoic Limestone-Dolomite "Series," central East Greenland. Am J Bot (1987) 0.81
Nondestructive, in situ, cellular-scale mapping of elemental abundances including organic carbon in permineralized fossils. Proc Natl Acad Sci U S A (2001) 0.81
Early proterozoic microfossils and penecontemporaneous quartz cementation in the sokoman iron formation, Canada. Science (1981) 0.80
Evidence from Opportunity's Microscopic Imager for water on Meridiani Planum. Science (2004) 0.80
A gunflint-type microbiota from the Duck Creek dolomite, western Australia. Orig Life (1976) 0.79
Microbenthic distribution of Proterozoic tidal flats: environmental and taphonomic considerations. Geology (1996) 0.78
Stable isotopic compositions of carbonates from the Mesoproterozoic Bangemall Group, northwestern Australia. Chem Geol (1995) 0.78
Paleobiology of the Mesoproterozoic-Neoproterozoic transition: the Sukhaya Tunguska Formation, Turukhansk Uplift, Siberia. Precambrian Res (1997) 0.76
Paleobiology of the Mesoproterozoic Billyakh Group, Anabar Uplift, northern Siberia. J Paleontol (1995) 0.76
Planetary science: bedrock formation at Meridiani Planum. Nature (2006) 0.75
Soils of Eagle crater and Meridiani Planum at the Opportunity Rover landing site. Science (2004) 0.75
Earth's Early Life. Science (1993) 0.75
Marine pisolites from Upper Proterozoic carbonates of East Greenland and Spitsbergen. Sedimentology (1989) 0.75
Microfossils in cherts from the Mesoproterozoic (Middle Riphean) Debengda Formation, the Olenek Uplift, northeastern Siberia. Stratigr Geol Correl (1994) 0.75
Microfossils from silicified stromatolitic carbonates of the Upper Proterozoic Limestone-Dolomite 'Series', central East Greenland. Geol Mag (1989) 0.75
Coastal lithofacies and biofacies associated with syndepositional dolomitization and silicification (Draken Formation, Upper Riphean, Svalbard). Precambrian Res (1991) 0.75
Response: late permian extinctions. Science (1996) 0.75
The distribution and evolution of microbial life in the Late Proterozoic era. Annu Rev Microbiol (1985) 0.75
Strontium isotopic variations of Neoproterozoic seawater: implications for crustal evolution. Geochim Cosmochim Acta (1991) 0.75
The archean: the young Earth. Science (1988) 0.75
Algal fossils: paleoalgology. Science (1986) 0.75
Integrated chronostratigraphy of Proterozoic-Cambrian boundary beds in the western Anabar region, northern Siberia. Geol Mag (1996) 0.75
Probable calcified metaphytes in the latest Proterozoic Nama Group, Namibia: origin, diagenesis, and implications. J Paleontol (1991) 0.75
Middle and Late Cambrian sponge spicules from Hunan, China. J Paleontol (1996) 0.75