-
Himalayas develop due to uplifting caused by the Indian subcontinent and Eurasian continents colliding
-
Earth forms; continental shields appear; fossils are rare; cyanobacteria are the most common organism
-
Geological Timescale
-
Shelled barchiopods appear
-
Trilobites appear
-
Age of Fishes, fish that can breath out of the water and spend time on land form
-
Huge plants begin to develop, early amphibians form
-
Eurypterids (sea scorpions), sea stars and coral become more common
-
Vascular land plants and animals, such as scorpions begin to evolve on land
-
Colonies of tiny invertebrates called graptolites flourished and vertibrates appear, Fish did not have jaws or teeth and their bodies were covered with bony plates.
-
Echinoderms appear; brachiopods increase; trilobites decline; graptolites flourish.
-
Coal deposits form
-
Amphibians appear
-
swamps and forests cover the land
-
dragon flies are common
-
Giant cockroaches appear.
-
Brachiopods are common in the ocean
-
Appalachian Mountains are created because of collision of tectonic plates and savannahs form.
-
last period of the Paleozoic era
-
Welcome to the world of the Dinosaur! Enter the squirrel sized dinosaur and the first forest dwelling mammals appear.
-
Ichthyosaurs are living in the ocean, new invertebrates call ammonite develop.
-
Flying reptiles called pterosaurs are in the air now
-
Whoa those dinos are getting big and dominating the land - Lizards hipped and bird-hipped appear - carnivores and herbivores have arrived
-
First flowering plants appear - angiosperm
-
There is very little plant life during this period
-
first primates evolve
-
Homosapiens (modern humans) appeared and hunters
-
Flying squirrels, whales, and bats appear.
-
First modern horses appear.
-
The last glacial period ended and sea levels rose, Great Lakes formed
-
Some scientists believe that human kind has caused mass extinctions of plant and animal species, polluted the oceans and altered the atmosphere
-
Species that did not evolve to survive extreme cold moved to warmer climate areas or become extinct ( dire wolf and ground sloth )
-
Species migrated between continents across land bridges
