-
Geological Timescale
-
early reptiles resembling large lizards appear 21
-
age of the fish, fish that can breath out of the water adnd spend time on the land
-
eurypterids, sea stars and coral become more common vascular land plant and animals such as scorpions begin to evolve on land
-
there is a very little plant life during this period 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
-
Trilobites appear
shelled brachiopods appear -
the presence of stromatolites indicate that shallow seas covered much of earth during intervals in this period nearly half of the valuable mineral deposits in the world occur in the rocks of this period
-
the last glacial period ended and sea levels rose, great lakes formed modern human developed agriculture and used tools made of bronze and iron
-
homosaphien appeard and are hunters species that did not evolve to survive moved to warmer areas
-
moved around into different continents first modern horses
-
-First Flowering plants appear-Angiosperm -Impact Hypothesis - dinosaur mass extinction 5,35
-
-Flying reptiles called pterosaurs are in the air now -Whoa those dinos are getting big and do and dominate the land lizzard hipped and bird hipped appear carnivores and herbivores have arrived 3,13
-
-welcome to the world of the Dinosaur! Enter the squirrel sized dinosaur and the first forest dwelling mammals appear -ichthysaurs are living in the ocean, new invertebrates call ammonite develop 16,34
-
-Appalachian Mountains are created because of the collision of the tectonics plates and savannahs form -Environmental change causes mass extinction of sea invertibrates as the seas retreat
8,38 -
Giant cockroaches appear coal deposits form 4,15
-
Himalayas develop due to uplifting caused by the Indian subcontinent and Eurasian continents colliding Many early mammal become extinct, clams and snails flourish
-
Some scientist believe that human kind has caused mass extinctions of plant and animal species, polluted the oceans and altered the atmosphere There is an 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
-
Swamps and forest covered the land
-
First modern horses appear
-
World wide temperatures drop about 4 degrees Celsius Flying squirrels, whales and bats appear
