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Thede dates are aproxamations, they are not written in stone .. Hummm . .
Fossles are stone Well. anyway the fossle records have to read by
scientists.
Prehistoric History :
bya = Billion Years Ago
1 bya Major continental collisions.
2 bya to 600 Million Proterozoic time.
mya = Million Years Ago
1 mya (apox) Homo erectus begins to migrate to Europe and Asia can you say grandma and grandpa
1.7 mya Homo erectus or erect standing man
1.8 mya Homo habilis or tool-making man
1.8 mya Nutcracker Man discovered in Tanzania by Mary Leakey
4-2 mya Hominid species-(australopithecus afarensis) in Ethiopia
4.4 mya Earliest evidence of pre-human hominid species
435-395 mya Silurian period.
440 mya Ice Age in the Sahara.
440-400 mya Silurian period. sea withdrew before flooding the continents again.
465-415 mya SILURIAN PERIOD
470 mya Liverworts go from the oceans to dry land.
500 mya Earth had 20 hours for a days.
500 mya Gondwanaland formed.
500 mya Vertebrates insects, arthropods
500-440 mya Ordovician period. most of continent covered by seas
510 mya End of Cambrian (Pangaea had split into four continents)
520-465 mya ORDOVICIAN PERIOD
570-230 mya Paleozoic Era.
580-255 mya PALAEOZOIC ERA
580-520 mya CAMBRIAN PERIOD ( Small-shelled bivalve creatures)
600-225 mya Paleozoic Era. (marine invertebrates, primitive fishes, land plants, and primitive reptiles)
Years BC
100,000-40,000 Neanderthal Man, in Africa and Europe
100,000+ Homo sapiens, or wise man
10,000-6,000 Shift from Hunter Gatherer to food producer in some areas (West Asia initially, Egypt by 6,000)
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