Geografi adalah unik dalam menjembatani ilmu-ilmu sosial (geografi manusia) dengan ilmu alam (geografi fisik). Though there’s considerable uncertainty in greenhouse predictions, temperatures could be as warm as at any time within the last 600 million years. The La Brea tar pits in Los Angeles, California, have yielded intensive information about vegetation and animals of the Pleistocene Epoch.
The Albian-age rocks in Nebraska sit directly on 300 million yr outdated late Paleozoic strata. Samples of historic air trapped within the ice cores indicated that levels of carbon dioxide and methane in the environment had been decrease through the ice ages.
Local weather change on completely different timescales all through Earth’s historical past has been the topic of a lot study and debate among geologists. Worldwide air and sea temperatures decreased a number of degrees Celsius. Sea ice additionally prolonged to about 40 to forty five°N and about 50°S around Antarctica.
Fossil plants or their spores or pollen grains are increasingly helpful in determining the age of rock layers or in correlating rock strata from one place to a different. The biggest continent, Gondwana (Australia, India, China, and Antarctica), stretched from the equator to the South Pole.
Paleogeography is used to explain the changing positions of the continents and the traditional extent of land, mountains, shallow sea, and deep ocean basins. Textual content is offered underneath the Creative Commons Attribution-ShareAlike License ; additional terms may apply.