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The Rise of Mammals: The Paleocene & Eocene Epochs
The Paleocene epoch was a time of recovery for mammals and birds, survivors of the Mesozoic era. As the Earth continued to change as the continents drifted further apart, it was a world of evolutionary experiments, as birds and mammals each found ways to fill the ecological gaps left vacant by the disappearance of the dinosaurs. "The Rise of Mammals" details the pattern of bird and mammal evolution prior to the Cenozoic era as well as the critical first 10-million-year span of the Cenozoic known as the Paleocene epoch, during which mammals and birds rapidly adapted to the new ecological conditions. By the end of the Paleocene epoch, the roots of most modern birds and mammal families had been set, forging a series of divergent and specialized paths that continue to radiate some 55 million years later. |
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Global Warming: Greenhouse gas, Greenhouse effect, Solar variation, Effects of global warming, Temperature record, Paleocene-Eocene Thermal Maximum, Global climate model, Ocean acidification
Global Warming - Greenhouse gas, Greenhouse effect, Solar variation, Effects of global warming, Temperature record, Paleocene?Eocene Thermal Maximum, Global climate model, Ocean acidification, Climate change and agriculture, Shutdown of thermohaline circulation, Shutdown of thermohaline circulation, Economics of global warming, Mitigation of global warming, Kyoto Protocol, Geoengineering, Adaptation to global warming, Low-carbon economy, Global warming controversy, Politics of global warming, Climate change denial, Global dimming, Global cooling, List of scientists opposing scientific assessment of global warming. |
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Eocene
The Eocene epoch, lasting from 55.8 ± 0.2 to 33.9 ± 0.1 Ma (million years ago), is a major division of the geologic timescale and the second epoch of the Palaeogene period in the Cenozoic era. The Eocene spans the time from the end of the Paleocene epoch to the beginning of the Oligocene epoch. The start of the Eocene is marked by the emergence of the first modern mammals. The end is set at a major extinction event called Grande Coupure (the "Great Break" in continuity), which may be related to the impact of one or more large bolides in Siberia and in what is now Chesapeake Bay. As with other geologic periods, the strata that define the start and end of the epoch are well identified, though their exact dates are slightly uncertain. The name Eocene comes from the Greek (eos, dawn) and (kainos, new) and refers to the "dawn" of modern ('new') mammalian fauna that appeared during the epoch. |