The coal measures of the Permian gave way to barren red beds in the early part of the Triassic Period about to million years ago. By million years ago the foreland basin of eastern Australia had been overthrusted by the… Geologic processes Cenozoic rocks are extensively developed on all the continents, particularly on lowland plains, as, for example, the Gulf and Atlantic coastal plains of North America. They are generally less consolidated than older rocks, although some are indurated cemented as a result of high pressure due to deep burial, chemical diagenesisor high temperature—namely, metamorphism. The main Alpine orogenywhich produced the Alps and Carpathians in southern Europe and the Atlas Mountains in northwestern Africa, began roughly between 37 million and 24 million years ago.
The Quaternary Period was officially recognized by the International Commission on Stratigraphy in June and the former term, Tertiary Periodbecame officially disused in due to the need to divide the Cenozoic into periods more like those of the earlier Paleozoic and Mesozoic eras.
Knowledge of this era is more detailed than any other era because of the relatively young, well-preserved rocks associated with it. Paleogene Period[ edit ] The Paleogene spans from the extinction of non-avian dinosaurs, 66 million years ago, to the dawn of the Neogene, It features three epochs: Basilosaurus The Paleocene epoch lasted from 66 million to 56 million years ago.
Modern placental mammals originated during this time. The Paleocene is a transitional point between the devastation that is the K-T extinctionto the rich jungle environment that is the Early Eocene. The Early Paleocene saw the recovery of the earth. The continents began to take their modern shape, but all the continents and the subcontinent of India were separated from each other.
Afro-Eurasia was separated by the Tethys Seaand the Americas were separated by the strait of Panama, as the isthmus had not yet formed. This epoch featured a general warming trend, with jungles eventually reaching the poles.
The oceans were dominated by sharks  as the large reptiles that had once predominated were extinct. Archaic mammals filled the world such as creodonts extinct carnivores, unrelated to existing Carnivora.
The Eocene Epoch ranged from 56 million years to In the Early-Eocene, species living in dense forest were unable to evolve into larger forms, as in the Paleocene.
There was nothing over the weight of 10 kilograms. At the top of the food chains were huge birds, such as Paracrax. The temperature was 30 degrees Celsius with little temperature gradient from pole to pole. This disrupted ocean currents worldwide and as a result caused a global cooling effect, shrinking the jungles.
This allowed mammals to grow to mammoth proportions, such as whales which, by that time, had become almost fully aquatic. Mammals like Andrewsarchus were at the top of the food-chain.
The Late Eocene saw the rebirth of seasons, which caused the expansion of savanna-like areas, along with the evolution of grass. The Oligocene Epoch spans from The Oligocene featured the expansion of grass which had led to many new species to evolve, including the first elephants, cats, dogs, marsupials and many other species still prevalent today.
Many other species of plants evolved in this period too. A cooling period featuring seasonal rains was still in effect. Mammals still continued to grow larger and larger. Mammals are the dominant terrestrial vertebrates of the Cenozoic.
The Neogene spans from It features 2 epochs: Kelp forests evolved, encouraging the evolution of new species, such as sea otters. During this time, perissodactyla thrived, and evolved into many different varieties. Apes evolved into 30 species. Many new plants evolved: The Pliocene featured dramatic climactic changes, which ultimately led to modern species and plants.
The Mediterranean Sea dried up for several million years because the ice ages reduced sea levels, disconnecting the Atlantic from the Mediterranean, and evaporation rates exceeded inflow from rivers.
Australopithecus evolved in Africabeginning the human branch. The isthmus of Panama formed, and animals migrated between North and South Americawreaking havoc on local ecologies. The world map has not changed much since, save for changes brought about by the glaciations of the Quaternary, such as the Great LakesHudson Bayand the Baltic sea.
It features modern animals, and dramatic changes in the climate. It is divided into two epochs: Megafauna of the Pleistocene mammothscave lionswoolly rhinoMegaloceroshorses The Pleistocene lasted from 2. This epoch was marked by ice ages as a result of the cooling trend that started in the Mid-Eocene.
There were at least four separate glaciation periods marked by the advance of ice caps as far south as 40 degrees N latitude in mountainous areas.Cenozoic era The Tertiary period saw the formation of the north sea, all so during this period The UK was uplifted and once again eroded resulting in more sediments been deposited.
During the Quaternary period several ice ages took place which caused major changes, the diversion of the river Thames is believed to be the most sever change. CENOZOIC ERA Presentation by: The huge group known as B-2 Cenozoic period mYA-Present (age of mammals’) Sharks were the dominant predator in the oceans of the Cenozoic era.
The Cenozoic Megaladon was the dominant shark. Over time the Megalodon died out. TEST!!!!! Essay Test Taking Tips. Untitled Prezi. Untitled Prezi.
More prezis. Cenozoic Era words, approx. 3 pages Cenozoic Era In geologic time, the Cenozoic Era, the third era in the Phanerozoic Eon, follows the Mesozoic Era and spans the time between roughly 65 million years ago (mya) and present day.
Essay on The Baroque Era THE BAROQUE AGE Social and Cultural Background Baroque is a term borrowed from the visual arts and one that is used in many different senses.
The Baroque Era applies to the years between and Climate change, periodic modification of Earth’s climate brought about as a result of changes in the atmosphere as well as interactions between the atmosphere and various other geologic, chemical, biological, and geographic factors within the Earth system.
The Cenozoic Era contains two geologic time periods, including the Tertiary Period (65 mya to approximately mya) and the current Quaternary Period ( mya to present day).
The Tertiary Period is also sometimes referred to in terms of a Paleogene Period and a Neogene Period.