Search results
Results from the WOW.Com Content Network
The Great American Biotic Interchange (commonly abbreviated as GABI), also known as the Great American Interchange and the Great American Faunal Interchange, was an important late Cenozoic paleozoogeographic biotic interchange event in which land and freshwater fauna migrated from North America to South America via Central America and vice ...
Areas of Cenozoic North America that were covered by seawater tended to be areas near the modern coasts. [135] The Cannonball Sea near Minot, North Dakota was the last of the North American interior. [136] Cenozoic marine invertebrates are best known from deposits near the coasts and tend to resemble modern forms.
On a map showing only volcanic rocks, the west coast of North America shows a striking continuous north–south structure, the American Cordillera. The North American Cordillera extends up and down the coast of North America and roughly from the Great Plains westward to the Pacific Ocean , narrowing somewhat from north to south.
During the Cenozoic, the orogen resulted in the construction of the Tibetan Plateau between the Tethyan Himalayas in the south and the Kunlun and Qilian mountains in the north. [53] Later, South America was connected to North America via the Isthmus of Panama, cutting off a circulation of warm water and thereby making the Arctic colder, [54] as ...
Cenozoic life of South America (3 C) Cenozoic paleontological sites of South America (1 C, 4 P) Cenozoic stratigraphic units of South America (2 C) 0–9.
Then in the Middle Cretaceous, Gondwana fragmented to open up the South Atlantic Ocean as South America started to move westward away from Africa. The South Atlantic did not develop uniformly; rather, it rifted from south to north. Map of Earth around 60 million years ago, during the Early Cenozoic (Paleocene)
The Cenozoic is also known as the Age of Mammals because the terrestrial animals that dominated both hemispheres were mammals – the eutherians in the Northern Hemisphere and the metatherians (marsupials, now mainly restricted to Australia and to some extent South America) in the Southern Hemisphere. The extinction of many groups allowed ...
Laurentia basement rocks. Laurentia or the North American Craton is a large continental craton that forms the ancient geological core of North America.Many times in its past, Laurentia has been a separate continent, as it is now in the form of North America, although originally it also included the cratonic areas of Greenland and the Hebridean Terrane in northwest Scotland.