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The Paleocene-Eocene Thermal Maximum: A Perturbation of Carbon Cycle, Climate, and Biosphere with Implications for the Future
During the Paleocene-Eocene Thermal Maximum (PETM), ∼56 Mya, thousands of petagrams of carbon were released into the ocean-atmosphere system with attendant changes in the carbon cycle, climate, oceanExpand
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Global patterns in leaf 13C discrimination and implications for studies of past and future climate
Fractionation of carbon isotopes by plants during CO2 uptake and fixation (Δleaf) varies with environmental conditions, but quantitative patterns of Δleaf across environmental gradients at the globalExpand
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Assessing the Causes of Late Pleistocene Extinctions on the Continents
One of the great debates about extinction is whether humans or climatic change caused the demise of the Pleistocene megafauna. Evidence from paleontology, climatology, archaeology, and ecology nowExpand
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Fossils and fossil climate: the case for equable continental interiors in the Eocene
There are many methods for inferring terrestrial palaeoclimates from palaeontological data, including the size and species diversity of ectothermic vertebrates, the locomotor and dental adaptationsExpand
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Eocene continental climates and latitudinal temperature gradients
Global climate during the Mesozoic and early Cenozoic is thought to have been warmer than at present, but there is debate about winter temperatures. Paleontological data indicate mild temperaturesExpand
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Transient Floral Change and Rapid Global Warming at the Paleocene-Eocene Boundary
Rapid global warming of 5° to 10°C during the Paleocene-Eocene Thermal Maximum (PETM) coincided with major turnover in vertebrate faunas, but previous studies have found little floral change. PlantExpand
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High Plant Diversity in Eocene South America: Evidence from Patagonia
Tropical South America has the highest plant diversity of any region today, but this richness is usually characterized as a geologically recent development (Neogene or Pleistocene). From caldera-lakeExpand
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Paleobotanical evidence for near present-day levels of atmospheric Co2 during part of the tertiary.
Understanding the link between the greenhouse gas carbon dioxide (CO(2)) and Earth's temperature underpins much of paleoclimatology and our predictions of future global warming. Here, we use theExpand
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Magnitude of the carbon isotope excursion at the Paleocene-Eocene thermal maximum: The role of plant community change
Carbon-isotope measurements (δ 13 C) of leaf-wax n-alkanes from the Paleocene–Eocene Thermal Maximum (PETM) in the Bighorn Basin, Wyoming, reveal a negative carbon isotope excursion (CIE) of 4–5‰,Expand
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History and causes of post-Laramide relief in the Rocky Mountain orogenic plateau
The Rocky Mountain orogenic plateau has the highest mean elevation and topographic relief in the contiguous United States. The mean altitude exceeds 2 km above sea level and relief increases from 30Expand
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