1. EARTH HISTORY
ERAS PERIODS EPOCHS

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

3. PERIOD
ERAS are SUBDIVIDED into periods except for the Precambrian (not enough info)

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

5. PRECAMBRIAN
1st Era
Longest era (4 billion years long)

6. 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

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

14. 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

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

22. DUNKLEOSTEUS

23. ICHTHYOSAURUS

24. BRACHAUCHENIUS

25. ARCHELON

32. Ceolocanth- FOSSIL or ALIVE?

33. CONTINENTS DURING LATE PALEOZOIC:
Kept moving together- PANGEA forms
More mountains form
WHAT MARKED THIS ERA’S END?
Shallow water organisms extinct
TRILOBITES extinct

37. MESOZOIC ERA 3rd Era “Middle Life” Age of Reptiles and Dinosaurs
lasted 160 MILLION years

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

39. DINOSUARS

47. AMBULOCETUS

54. SUPER CROC

57. HELICOPRION

61. FIRST BIRD?

62. PHORUSRACHUS

64. ARCHAEOPTERYX

66. 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

68. BREAK-UP
OF PANGEA

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

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

73. CLIMATE CONTINENTS WHAT WILL MARK THE END OF THIS ERA???????
World-wide cooling
Glaciers cover most land ICE AGES
CONTINENTS
Still moving
WHAT WILL MARK THE END OF THIS ERA???????

79. HYRACOTHERIUM

80. UINTATHERIUM

83. PLESIADAPIS

84. ANDREWSARCHUS

85. DOEDICURUS

86. GASTORNIS

87. HYAENODON

88. LEPTICTIDIUM

89. MEGALOSARUS

90. MEGATHERIUM

91. PANTODONT

92. PROPALAEATHERIUM

93. PSITTACOSAUR

94. MAMMAL with small DINOSAUR in stomach

95. BABY MAMMOTH

96. ALGAE found in ICE around the MAMMOTH

97. SCIENTISTS working on MAMMOTH

98. BLOW DRYING THE MAMMOTH

99. MAMMOTH FUR

100. MAMMOTH TUSKS

101. MAMMOTH MOLARS

102. Walking With Prehistoric Beasts

103. ICEMAN

104. BODY TATTOOS?

105. STOMACH and INTESTINE REMAINS

106. PARTS OF A CLOAK

107. HAT

108. LEGGINGS

109. DAGGER

110. AXE

111. BOW and ARROWS

116. ILLINOIS HISTORY

117. FLUORITE- State Mineral

118. TULLY MONSTER- State Fossil

119. TETRAPOD- Mazon Creek, IL.

121. COAL SWAMPS

122. EARLY ILLINOS- Paleozoic Era

124. Shawnee Natural Forest