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GEOLOGIC TIME (AGE) RELATIVE Comparison of Features relative to one another ABSOLUTE

GEOLOGIC TIME (AGE) RELATIVE Comparison of Features relative to one another ABSOLUTE Establish or determine numerical dates for Features. LAWS (PRINCIPALS) OF DETERMINING RELATIVE AGE ORIGINAL HORIZONTALITY LATERAL CONTINUITY SUPERPOSITION UNCONFORMITIES (WITH 3 ABOVE) INCLUSIONS

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GEOLOGIC TIME (AGE) RELATIVE Comparison of Features relative to one another ABSOLUTE

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  1. GEOLOGIC TIME (AGE) • RELATIVE • Comparison of Features relative to one another • ABSOLUTE • Establish or determine numerical dates for Features

  2. LAWS (PRINCIPALS) OF DETERMINING RELATIVE AGE • ORIGINAL HORIZONTALITY • LATERAL CONTINUITY • SUPERPOSITION • UNCONFORMITIES (WITH 3 ABOVE) • INCLUSIONS • Erosional (“float”) • Igneous Intrusions • CROSS-CUTTING FEATURES • Faults • Unconformities • Igneous Intrusions

  3. UNCONFORMITIES

  4. D C B A ORIGINAL HORIZONTALITY & SUPERPOSITION

  5. C B A ORIGINAL HORIZONTALITY, SUPERPOSITION & INCLUSIONS

  6. F E D C B A ORIGINAL HORIZONTALITY, SUPERPOSITION, UNCONFORMITIES, & INCLUSIONS

  7. H G F E D C B A ORIGINAL HORIZONTALITY, SUPERPOSITION, UNCONFORMITIES, CROSS-CUTTING FEATURES, & INCLUSIONS

  8. C B A CROSS-CUTTING FEATURES

  9. F E D C B A ORIGINAL HORIZONTALITY, SUPERPOSITION, UNCONFORMITIES, CROSS-CUTTING FEATURES, & INCLUSIONS

  10. F E D C B A ORIGINAL HORIZONTALITY, SUPERPOSITION, UNCONFORMITIES, CROSS-CUTTING FEATURES, & INCLUSIONS

  11. PUZZLE: • Look at overall picture and see where the oldest units are. • Work your way “upward” from oldest to youngest looking at the relational features using the “principals”

  12. Carbon-14; Half-life = 5,730 Years; 12.5% of C-14 Left. # Half-lifes? Age? 3 Half-lives: 3 x 5,730 years = 17,190 years

  13. PAGE 223

  14. ACTIVITIES • 8.2: A, B • 8.4: A, B, C, D(1), E • 8.5: A

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