geologic time

2. Radioactivity And Half-Life

3. 4.5 Absolute Geologic Time

4. Radiometric Dating

5. 4.5 The Geologic Column and Time
Scale

6. The Earliest Eons of Geologic Time:
Precambrian Time

7. The Phanerozoic Eon
• The number of species with shells and skeleton
dramatically increased.
• The total number of individual organisms
preserved as fossils increased greatly.
• The total number of species preserve as fossils
increased greatly
• The average size of individual organisms
increased

8. VIRTUAL FIELD TRIP
GEOLOGIC TIME
GRAND CANYON
NATIONAL PARK in
ARIZONA and CAPITOL
REEF NATIONAL PARK in
UTAH
GRAND CANYON NATIONAL
PARK
CAPITOL REEF NATIONAL PARK

9. FOSSILS FOUND IN GRAND
CANYON