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Antropene
7-Some scientists believe that human kind has caused mass extinctions of plant and animal species, polluted the oceans and altered the atmosphere 14-There is argument as to when this epoch began, some scientist think it began with the industrial age in the early 1800's other think it began with the atomic age in the 1950's -
Period: to
J Nunez P2
Geological Timescale -
Holocene
19-The last glacial period ended and sea levels rose, Great Lakes formed 28-Modern human developed agriculture and used tools made of bronze and iron -
Pleistocene
8-Appalachian Mountains are created because of the collision of tectonic plates & savannahs form 9-Homosapien (modern humans) appeared & are hunters -
Pliocene
6-Himalayas develop due to uplifting caused by the Indian subcontinent and Eurasian continents colliding 20-Species that did not evolve to survive extreme cold moved to warmer climate areas or became extinct (dire wolf & giant ground sloth) -
Miocene
10-The presence of stromatolites indicates that shallow seas covered much of Earth during intervals in this period 25-World wide temperatures drop about 4 degrees celsius (39.2 degrees fahrenheit) -
Oligocene
21-Early reptiles resembling large lizards appear 32-Antarctic icecaps begin to form -
Eocene
17-Flying squirrels, whales and bats appear 26-First modern horses appear -
Paleocene
12- First primates evolve 29-Small rodents evolve -
Cretaceous
5-First flowering plants appear - angiosperm 35-Impact hypothesis - dinosaur mass extinction -
Jurassic
3-Flying reptiles called pterosaurs are in the air now 13-Whoa those dinos are getting big & dominate the land - Lizard-hipped and bird-hipped appear - carnivores and herbivores have arrived -
Triassic
16-Welcome to the world of the Dinosaur! Enter the squirrel sized dinosaur & the first forest dwelling mammals appear 34-Ichthyosaurs are living in the ocean, new invertebrates call ammonite develop -
Permian
18-Various species migrated between continents across land bridges 36-Mediterranean Sea dries up and refills several times due to tectonic forcesa dn dropping sea levels -
Pennsylvanian
4-Giant cockroaches appear 15-Coal deposits form -
Mississippian
2-Swamps and forests cover the land 31-Huge plants begin to develop, early amphibians form -
Devonian
37-Age of Fishes, fish that can breath out of the water and spend time on land form
38-Environmental change causes mass extinction of sea invertibrates (trilobites & eurypterids) as the seas retreat -
Silurian
1-There is very little plant life during this period 24-Eurypterids (sea scorpions), sea stars and coral become more common -
Ordovician
30-Colonies of tiny invertebrates call graptolites florished and vertibrates appear, Fish did not have jaws or teeth and their bodies were covered with bony plates 10-Nearly half of the valuable mineral deposits in the world occur in the rocks of this period -
Cambrian
22-Trilobites appear
23-Shelled brachiopods appear -
Precambrian Period
33-Vascular land plants and animals, such as scorpions begin to evolve on land
27-Many early mammal become extinct, clams and snails flourish