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ERAS PERIODS EPOCHS Major divisions of geologic time Marked by major changes in living things or the earth’s surface 4 Eras.

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Presentation on theme: "ERAS PERIODS EPOCHS Major divisions of geologic time Marked by major changes in living things or the earth’s surface 4 Eras."— Presentation transcript:

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2 ERAS PERIODS EPOCHS

3 Major divisions of geologic time Marked by major changes in living things or the earth’s surface 4 Eras

4 ERAS are SUBDIVIDED into periods except for the Precambrian (not enough info)

5 PERIODS are SUBDIVIDED into EPOCHS Only CENOZOIC ERA has epochs (most info)

6 PRECAMBRIAN 1st Era1st Era Longest era (4 billion years long)Longest era (4 billion years long)

7 LIFE DURING PRECAMBRIAN WHAT MARKED THE BEGINNING? Earth and solar system formed EARTH’S SURFACE: Covered by water (oceans only) EARLIEST KNOWN FOSSILS: Bacteria and Algae

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14 PALEOZOIC ERA 2nd Era “Ancient Life” Age of Invertebrates (no backbones) Lasted 345 Million Years

15 LIFE DURING EARLY PALEOZOIC ERA: sponges, jellyfish,clams, starfish, worms, first fish TRILOBITES dominated ocean EARTH’S SURFACE DURING EARLY PALEOZOIC ERA: Continents moved together APPALACHIAN mountains formed

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22 LIFE DURING LATE PALEOZOIC ERA ANIMALS sharks lungfish first frogs first reptiles PLANTS swampy forests large ferns (coal)

23 DUNKLEOSTEUS

24 ICHTHYOSAURUS

25 BRACHAUCHENIUS

26 ARCHELON

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33 Ceolocanth- FOSSIL or ALIVE?

34 CONTINENTS DURING LATE PALEOZOIC: Kept moving together- PANGEA formsKept moving together- PANGEA forms More mountains formMore mountains form WHAT MARKED THIS ERA’S END? Shallow water organisms extinctShallow water organisms extinct TRILOBITES extinctTRILOBITES extinct

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38 MESOZOIC ERA 3rd Era3rd Era “Middle Life”“Middle Life” Age of Reptiles and DinosaursAge of Reptiles and Dinosaurs lasted 160 MILLION yearslasted 160 MILLION years

39 LIFE DURING MESOZOIC ANIMALS Turtles Crocodiles Alligators Dinosaurs PLANTS Seed plants form

40 DINOSUARS

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48 AMBULOCETUS

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55 SUPER CROC

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58 HELICOPRION

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62 FIRST BIRD?

63 PHORUSRACHUS

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65 ARCHAEOPTERYX

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67 MESOZOIC CONTINUED EARTH DURING MESOZOIC CONTINENTS Break-up of PANGEA ROCKY mountains formed (U.S.) CLIMATE: Wet and warm WHAT MARKED THIS ERA’S END? Extinction of DINOSAURS 1st BIRDS and 1st MAMMALS

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69 BREAK-UP OF PANGEA

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72 CENOZOIC ERA 4th Era “Recent Life” Age of Mammals 65 Million Years so far....

73 LIFE DURING CENOZOIC ERA ANIMALS: Getting larger Whooly Mammoths Saber-Tooth Tigers Humans PLANTS: Forests (Pine trees)

74 World-wide cooling Glaciers cover most land ICE AGESCONTINENTS Still moving WHAT WILL MARK THE END OF THIS ERA??????? CLIMATE

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80 HYRACOTHERIUM

81 UINTATHERIUM

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84 PLESIADAPIS

85 ANDREWSARCHUS

86 DOEDICURUS

87 GASTORNIS

88 HYAENODON

89 LEPTICTIDIUM

90 MEGALOSARUS

91 MEGATHERIUM

92 PANTODONT

93 PROPALAEATHERIUM

94 PSITTACOSAUR

95 MAMMAL with small DINOSAUR in stomach

96 BABY MAMMOTH

97 ALGAE found in ICE around the MAMMOTH

98 SCIENTISTS working on MAMMOTH

99 BLOW DRYING THE MAMMOTH

100 MAMMOTH FUR

101 MAMMOTH TUSKS

102 MAMMOTH MOLARS

103 Walking With Prehistoric Beasts

104 ICEMAN

105 BODY TATTOOS?

106 STOMACH and INTESTINE REMAINS

107 PARTS OF A CLOAK

108 HAT

109 LEGGINGS

110 DAGGER

111 AXE

112 BOW and ARROWS

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117 ILLINOIS HISTORY

118 FLUORITE- State Mineral

119 TULLY MONSTER- State Fossil

120 TETRAPOD- Mazon Creek, IL.

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122 COAL SWAMPS

123 EARLY ILLINOS- Paleozoic Era

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125 Shawnee Natural Forest


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