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Fossils and Earth’s Geologic History PRESENTED BY: MARK A. VAN HECKE ANCHOR BAY HIGH SCHOOL NEW BALTIMORE, MI
ALL GEOLOGIC TIME IS DIVIDED INTO TWO EONS PHANEROZOIC FROM 570 MILLION YEARS AGO TO THE PRESENT PRECAMBRIAN EON FROM 3.4 BILLION YEARS AGO TO 570 MILLION YEARS AGO
EACH EON IS DIVIDED INTO PERIODS ONLY THE PHANEROZOIC IS DIVIDED INTO PERIODS, THE THREE YOU NEED TO KNOW ARE PALEOZOIC MESOZOIC CENOZOIC
EACH OF THE ERAS IN TURN IS DIVIDED INTO PERIODS
PALEOZOIC ERA CAMBRIAN ORDOVICIAN SILURIAN DEVONIAN MISSISSIPIAN PERMIAN
MESOZOIC ERA TRIASSIC JURASSIC CRETACEOUS
CENOZOIC ERA TERTIARY QUATERNARY
PERIODS IN TURN ARE DIVIDED INTO EPOCHS
THE PERIODS OF THE PALEOZOIC AND MESOZOIC ARE SIMPLY DIVIDED INTO EARLY, MIDDLE AND LATE EPOCHS
EPOCHS OF THE CENOZOIC ERA ARE GIVEN DISTINCTIVE NAMES IN EACH OF THE PERIODS
TERTIARY PERIOD PALEOCENE EOCENE OLIGOCENE MIOCENE PLIOCENE
QUATERNARY PERIOD PLEISTOCENE HOLOCENE (PRESENT)
MOST GEOLOGISTS THINK THAT THROUGHOUT IT’S HISTORY EARTH’S CLIMATE HAS SEE- SAWED BETWEEN A ‘HOT HOUSE’ AND AN ‘ICE BOX’ CLIMATE
PreCambrian Eon 570 million-3.4 billion years ago
PALEOZOIC ERA 570 MILLION YEARS AGO- 225 MILLION YEARS AGO
CAMBRIAN PERIOD 570-500 MILLION YEARS AGO
ORDOVICIAN PERIOD 430-500 MILLION YEARS AGO
SILURIAN PERIOD 395-430 MILLION YEARS AGO
DEVONIAN PERIOD 345-395 MILLION YEARS AGO
THE MISSISSIPPIAN 325-345 MILLION YEARS AGO AND PENNSYLVANIAN PERIODS 280-325 MILLION YEARS AGO MAY BE GROUPED TOGETHER
AS THE CARBONIFEROUS PERIOD
PERMIAN PERIOD 225-280 MILLION YEARS AGO
TRIASSIC PERIOD 190-225 MILLION YEARS AGO
JURASSIC PERIOD 136-190 MILLION YEARS AGO
CRETACEOUS PERIOD 65-136 MILLION YEARS AGO
PALEOCENE EPOCH 54-65 MILLION YEARS AGO
EOCENE EPOCH 37.5-54 MILLION YEARS AGO
OLIGOCENE EPOCH 26 –37.5 MILLION
MIOCENE EPOCH 5-26 MILLION YEARS AGO
PLEISTOCENE EPOCH 11,000-1.8 MILLION YEARS AGO
HOLOCENE EPOCH 11,000 YEARS AGO- PRESENT
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