most extensive website of crystals and minerals in the world.
GEOLOGIC TIME LINE OF EARTH
||600-500 million years ago
||Algae, and invertebrae similar to jellyfish
and worms. The firstshelled animals begin to appear in the Cambrian
period. Arthopods, Brachiopods,Trilobytes
||500-440 million years ago
||Graptolites, Orthoceras, and primitive fish - the first
verterbrates begin to appear.
||440-395 million years ago
||The first true plants appear. Crinoids are abundant, and
eurypterids- believed to be the first air-breathing animal appears.
||395-345 million years ago
||Fish evolve into more complex animals, sharks and amphibians
||345-280 million years ago
||Ferns are plentiful and the first reptiles evolve from the
amphibians.Spiders, cockroaches, scorpions appear. First animals to live
on dry land.
||280-225 million years ago
||Reptiles become abundant. Trees similar to the pine develop,
trilobytes become extinct.
||225-190 million years ago
||The beginning of the dinosaurs. Plant eaters, meat eaters,
flying reptiles,and crocodiles.
||190-136 million years ago
||The giant dinosaurs developed, as well as abundant plant
life and shellfish.Ammonites, lobster, shrimp.
||136-65 million years ago
||Peak of development, as well as the downfall, of the great
dinosaurs.Triceratops, Tyrannosaurus Rex, the giant Pterodactyl.
||65-2 million years ago
||Mammals develop such as camels, bears, cats, monkeys, rodents,
dogs.Grasses, fruit develop like what we have today.
||2 million years ago to present
||More mammals develop, including the now extinct Saber-Toothed
Tiger and the Mastadon. Modern man appears.
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