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A weathering hypothesis for glaciation at high atmospheric pCO2 during the Late Ordovician
New paired carbonate and organic-carbon isotope analyses from Nevada, USA, together with a consideration of the effects of mountain-building and ice-sheet coverage of the continents on atmosphericExpand
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The Late Ordovician Mass Extinction
▪ Abstract Near the end of the Late Ordovician, in the first of five mass extinctions in the Phanerozoic, about 85% of marine species died. The cause was a brief glacial interval that produced twoExpand
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The Evolution of Reef Communities
THE REEF PHENOMENON: What is a Reef? Cenozoic Reef Models: Occurrence Cenozoic Reef Models II: Cenozoic Reef Models III Cenozoic Reef Models IV: Communities Ancient Reefs Autecology and History ofExpand
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Understanding the great ordovician biodiversification event (GOBE): influences of paleogeography, paleoclimate, or paleoecology
“The Great Ordovician Biodiversification Event” (GOBE) was arguably the most important and sustained increase of marine biodiversity in Earth’s history. During a short time span of 25 Ma, anExpand
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A new ecological-severity ranking of major Phanerozoic biodiversity crises
A new ecological-severity ranking of the major Phanerozoic biodiversity crises is proposed in which the Capitanian crisis is ranked lesser than the Frasnian (Late Devonian) but greater than theExpand
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Onshore-Offshore Patterns in the Evolution of Phanerozoic Shelf Communities
Cluster analysis of Cambrian-Ordovician marine benthic communities and community-trophic analysis of Late Cretaceous shelf faunas indicate that major ecological innovations appeared in nearshoreExpand
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Ecological ranking of Phanerozoic biodiversity crises: ecological and taxonomic severities are decoupled
Abstract The past two decades have seen extensive analyses of the taxonomic severity of major biodiversity crises in geologic time. In contrast, we propose here an alternative analysis of theExpand
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A new look at Ecologic Evolutionary Units (EEUs)
Abstract Ecologic Evolutionary Units (EEUs) were long intervals of Phanerozoic time during which marine communities maintained stable ecologic structures. Boucot (1983) recognized 12 EcologicExpand
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Shape of Mesozoic dinosaur richness
The richness of Mesozoic Dinosauria is examined through the use of a new global database. Mesozoic dinosaurs show a steadily increasing rate of diversification, in part attributable to theExpand
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Ecological ranking of Phanerozoic biodiversity crises: The Serpukhovian (early Carboniferous) crisis had a greater ecological impact than the end-Ordovician
We propose a new ecological ranking of the major Phanerozoic biodiversity crises in which the Serpukhovian biodiversity crisis is ranked fifth in ecological impact, lesser than the Late Devonian butExpand
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