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Precambrian Period MA
1.There is very little plant life during this period 11.Nearly half of the valuable mineral deposits in the world occur in the rocks pf this period. -
Period: to
M Seda Period 6 Day B
Geological Timescale -
Cambrian Period MA
10.The presence of stromatloites indicate that shallow seas covered much of Earth during intervals in this period. 22.Trilobites appear -
Ordovician Period MA
23.Shelled brachiopods appear. 30.Colonies of the tiny invertebrates call grapholites flourished and vertibrates appear, Fish did not have jaws or teeth and their bodies were covered with bony plates. -
Silurian Period MA
24.Eurypterids (sea scorpions), sea stars and carol become more common. 33.Vascular land plants and animals, such as scorpions begin to evolve on land. -
Devonian Period MA
31.Huge plants begin to develop, early amphibians. 37.Age of the fishes, fish that can breath out of water and spend time o land form. -
Mississippian Period MA
2.Swamps and forests cover the land. 34.Ichthyosaurs are living in the ocean, new invertebrates call ammonite develop. -
Pennsylvanian Period MA
4.Giant cockroaches appear. 15.Coal deposits form. -
Permian Period MA
21.Early reptiles resembling large lizards appear. 38.Enivromental change cause mass extinction of sea invertebrates as the seas retreat. -
Triassic Period MA
16.Welcome to the world of the Dinosaur! Enter the squirrel sized dinosaur & the first forest dwelling mammals appear. 29.Small rodents appear. -
Jurassic Period MA
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. -
Cretaceous Period MA
5.First Flowering plants appear- angiosperm. 35. Impact hypothesis- dinosaur mass extinction. -
Paleocene Period MA
6.Himalayas develop due to uplifting caused by the Indian subcontinent and Eurasian continent colliding.12.First primates evolve. -
Eocene Period MA
17.Flying squirrels, whales and bats appear. 26.First modern horses appear. -
Oligocene Period MA
18.Various species migrated between continents across land bridges. 27.Many early mammal become extinct, clams and snails flourish. -
Miocene Period Ma
8.Appalachian mountains are created because of the collision of tectonic & savanna. 25.World wide temperatures drop 4 degrees celsius. -
Pliocene Period MA
20.Species that did not evolve to survive extreme cold moved to warmer climate areas or became extinct. 36.Mediterran sea dries up and refills several times due to tectonic forces dropping sea levels. -
Pleistocene Period MA
9.Homosapians appeared & are humans. 32.Antarctic icecaps begin to form. -
Holocene Period MA
19.The last glacial period has ended and sea levels rose, Great Lakes formed. -
Anthropocene Period MA
7.Some scientists believe that human kind has caused mass extinctions of plant and animal species, polluted the ocean and altered the atmosphere.14.There is an argument as to when his epoch began, some scientists think it began with the industrial age in the early 1800's other think it began with the atomic age in the 1950's.
