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period of time extending from about 4.6 billion years ago to the beginning of the Cambrian Period, 541 million years ago. And the year was 4600  mya

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The Cambrian Period was the first geological period of the Paleozoic Era, and of the Phanerozoic Eon. The Cambrian lasted 55.6 million years from the end of the preceding Ediacaran Period 541 million years ago to the beginning of the Ordovician Period 485.4 mya. Its subdivisions, and its base, are somewhat in flux. And the year 540
mya

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The Ordovician period is the beginning of the construction of south carolina, And the Great extinition due to growth of ice caps including in what is now northern africa, during the year 490 mya

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this time period is when the first land plants to appear and land animals follow, during the year 443 mya

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Dominant animals fish, amphibians, evergreen, and ferns appear during the year 417 mya

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Much of north america is under water, the first seed plant appears, sea life flourishes including coral, brachiopods, blastoids, and bryozoa all during the year 354 mya

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During the year 320 mya reptiles develop from amphibians, and flying insects appear

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The pangea forms, and the appilations rise. 90% of earths species become extinct, including trilobites, blastoids, fish and amphibians. All during the year 290 mya

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during the year 248 mya The pangea began to break apart, rocky mountains and sierra nevada form. the first dinosours, mammals, crinoids, and modern echinoids appear

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during the year 206 mya the first birds appear, and it is the golden age of dinosaurs. Western us: orgeny of rockies; north america continues to rotate away from africa.

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A lot happened during this earthquakes was common sea levels rise, appalachians uplift, sandhills form, and volcanic activity in the north. during the ears 65.0, 54.8, 33.7, 23.8, 5.3 mya .

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during the year 1.8 mya ice sheets form modern day humans develop, asians arrive and settle the americans. during the year 0.01 mya mastadons become extinct, human culture flourishes , and accelerating extinction of many species