-
The presence of stromatolites indicates 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.
-
Geological timescale
-
trilobites appear. / shelled brachiopods appear.
-
the last glacial period ended and sea levels rose, Great Lakes formed. / species that did not evolve to survive extreme cold moved to warmer climate areas or became extinct (dire wold & giant ground sloth.
-
vascular land plants and animals, such as scorpions begin to evolve on land. / there is very little plant life during this period.
-
eurypterids (sea scorpions), sea stars and coral become more common. / huge plants begin to develop, early amphibians form.
-
coal deposits form. /
-
giant cockroaches appear. / swamps and forest cover the land.
-
early reptiles resembling large lizards appear. /
-
Appalachian mountains are created because of the collision of tectonics & savannahs. /
-
flying reptiles called pterosaurs are in the air now. / ichthyosaurs are living in the ocean, new invertebrates call ammonite develop.
-
whoa those dinos are getting big & dominate the land - lizard hipped and bird-hipped apear - carnivores and herbivores have arrived.
-
first flowering plants appear - angiosperm. / impact hypothesis - dinosaurs mass extinction.
-
homosapien (modern humans) appeared & are hunters. / first primate evolve.
-
world wide temperatures drop about 4 degrees celsius (39.2 degrees Fahrenheit). / antarctic icecaps begin to form.
-
-
-
various species migrated between continents across land bridges. / Mediterranean Sea dries up and refills several times due to tectonic forces a dn dropping sea levels.
-
many early mammal become extinct, clams and snails flourish. /
-
Some scientist believe that human kind has caused mass extinctions of plants and animal species, polluted the oceans and altered the atmosphere. / 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.
