Geol 102 The Cenozoic Era The Paleogene Period

Geol 102 The Cenozoic Era The Paleogene Period Paleogene geology. cenozoic is by far the best known era, representing only 1.4 % of earth history, yet the most commonly encountered rocks on the earth's surface and on the sea floor. paleogeography and geology of the paleogene: paleocene eocene: continuation of laramide orogeny in cordillera (began in maastrichtian, late cretaceous). Spring semester 2022the cenozoic era: the neogene period. paleogeography and geology of the neogene: continued himalayan orogeny (especially 20 ma onward) lifts himalayan plateau: modifies global air circulation. coincides with general drying episode and lowered amount of greenhouse gasses in atmosphere. obliteration of eastern tethys.

Geol 102 The Cenozoic Era The Paleogene Period It is dated to approximately 11,784 yr b2k (before 2000 ce; unlike radiocarbon dates in which the "present" is defined as 1950, the new ice core dates are relative to 2000 ad ce), with a plus minus 50 yr uncertainty. thus, the holocene begins at something close to 9700 bce. terrestrial life of the quaternary. Antarctic ice. covered by glaciers for 15 m.y. ice sheet began to form during eocene. glacial conditions established by miocene. east ant. ice cap present since middle miocene. ice volume was greater during latest miocene than today. antarctic bottom waters. cold waters were dense, sank to ocean floor. Learn about the time period that took place 65 to 23 million years ago. 3 min read at the dawn of the paleogene—the beginning of the cenozoic era—dinosaurs, pterosaurs, and giant marine. It is the latest of three geological eras, preceded by the mesozoic and paleozoic. the cenozoic started with the cretaceous–paleogene extinction event, when many species, including the non avian dinosaurs, became extinct in an event attributed by most experts to the impact of a large asteroid or other celestial body, the chicxulub impactor.

Geol 102 The Cenozoic Era The Paleogene Period Learn about the time period that took place 65 to 23 million years ago. 3 min read at the dawn of the paleogene—the beginning of the cenozoic era—dinosaurs, pterosaurs, and giant marine. It is the latest of three geological eras, preceded by the mesozoic and paleozoic. the cenozoic started with the cretaceous–paleogene extinction event, when many species, including the non avian dinosaurs, became extinct in an event attributed by most experts to the impact of a large asteroid or other celestial body, the chicxulub impactor. Cenozoic era, third of the major eras of earth’s history, beginning about 66 million years ago and extending to the present. it was the interval of time during which the continents assumed their modern configuration and geographic positions and during which earth’s flora and fauna evolved toward those of the present. During much of the early cenozoic, north america was covered by subtropical and tropical forests, but the climate became drier by oligocene and miocene time, especially in the midcontinent region. figure 18.5 cenozoic vegetation and climate 3. birds belonging to living orders and families evolved during the paleogene period.