-
precambrian
14# there is an arguments as to when this epoch began, some scientist think it began with the industrial age in the early 1800 other in the atomic age in the 1950 -
Period: to
V Rivera p-1
geological timescale -
cambrian
22# trilobites
23# shelled brachiopods appear -
ordovician
1# there is very little plant life during this period
30# colonies of tiny invertebrates call graptolites flourished and vertebrates appear......... -
silurian
24# eurypterids ( sea scorpions) sea stars and coral became more common
33# vascular land plants and animals, such scorpions ........ -
devonian
31 huge plants being develop
37 age of fishes, breath air out of water -
carboniferos
2 swamps and forest
4 giant cockroaches
15 coal deposits
21 reptiles resembling large lizards -
permian
10 shallows seas covered much of the earth during intervals in this period
38 environmental change cause mass extinction in trilobites -
triassic
16: welcome to the world dinosaur size of squirrel in forest the dwelling
34: new invertebrates call ammonite developed -
jurassic
3: flying reptiles call pterosaurs
13: dinos are getting bigger and dominate the land-exist liards-hipped and birds-hipped -
cretaceous
5: first flowering plants appeared
35: dinousaur mass extinction -
paleocene
27 early mammals become extinct
29: smaller rotates evolved -
eocene
17: flying squirrels whales and bats
25: temperature dropped about 4 degrees celsius -
oligocene
6: himalayas developed due to uplifting cause by indian subcontinent -
miocene
36: meditenarian sees dries up due to tectonic forsesa -
pliocene
18: various species migrate between continents
26: first horses appered -
pleistocene
20: species did not evolved to survived in cold and warmer climates -
holocene
19: the last glacial period and sea levels roas
28: human developed agriculture
