Principles of Historical Geology III Historical Geology – Principles III

Other Principles of Historical Geology Historical Geology – Principles III William "Strata" Smith Late 1700's obsessed English canal engineer

Other Principles of Historical Geology Historical Geology – Principles III Principle of Fossil Succession: 1. Fossils occur in an orderly and predictable fashion in a vertical succession of rocks. AAAAAA BBBBBBBB CCCCCCCC DDDDDDDD

Other Principles of Historical Geology Historical Geology – Principles III Principle of Fossil Succession: 1. Fossils occur in an orderly and predictable fashion in a vertical succession of rocks. AAAAAA BBBBBBBB CCCCCCCC DDDDDDDD No theory … just what you see!!!

Other Principles of Historical Geology Historical Geology – Principles III Principle of Fossil Succession: 2. Each stratigraphic level has an unique assemblage of fossils. AAAAAA BBBBBBBB CCCCCCCC DDDDDDDD

Other Principles of Historical Geology Historical Geology – Principles III Principle of Fossil Succession: 2. Each stratigraphic level has an unique assemblage of fossils. AAAAAA BBBBBBBB CCCCCCCC DDDDDDDD

Other Principles of Historical Geology Historical Geology – Principles III Principle of Fossil Succession: 2. Each stratigraphic level has an unique assemblage of fossils. AAAAAA BBBBBBBB CCCCCCCC DDDDDDDD (1)(1) (2)(2) (3)(3) (4)(4) (5)(5) (6)(6) AB Zone

Other Principles of Historical Geology Historical Geology – Principles III Principle of Fossil Succession: 3. Therefore, the same fossil assemblage found in layers of rock from two locations are:

Other Principles of Historical Geology Historical Geology – Principles III Principle of Fossil Succession: 3. Therefore, the same fossil assemblage found in layers of rock from two locations are: same position in sequence

Other Principles of Historical Geology Historical Geology – Principles III Fossil collecting at one locality yields many specimens of: C and D but no others. What is your position?

Other Principles of Historical Geology Historical Geology – Principles III AAAAAA BBBBBBBB CCCCCCCC DDDDDDDD (1)(1) (2)(2) (3)(3) (4)(4) (5)(5) (6)(6) Fossil collecting at one locality yields many specimens of: C and D but no others. What is your position? Zone 5

Other Principles of Historical Geology Historical Geology – Principles III Principle of Fossil Succession: 3. Therefore, the same fossil assemblage found in layers of rock from two locations are: same position in sequence same position in Earth’s History

Other Principles of Historical Geology Historical Geology – Principles III AAAAAA BBBBBBBB CCCCCCCC DDDDDDDD (1)(1) (2)(2) (3)(3) (4)(4) (5)(5) (6)(6) FFFFFF EEEEEEEE CCCCCC DDDDDDDD “Home” “new & unknown” BBBB

Other Principles of Historical Geology Historical Geology – Principles III AAAAAA BBBBBBBB CCCCCCCC DDDDDDDD (1)(1) (2)(2) (3)(3) (4)(4) (5)(5) (6)(6) FFFFFF EEEEEEEE CCCCCC DDDDDDDD “Home” “new & unknown” BBBB

Other Principles of Historical Geology Historical Geology – Principles III Principle of Fossil Succession: allows for Correlation: establishing lateral equivalence of rock layers that were once continuous.

The map that changed the world: Historical Geology – Principles III link to map W. Smith

The map that changed the world: Historical Geology – Principles III link to map W. Smith The first geologic map

Historical Geology – Principles III

Review Historical Geology – Principles III Superposition Original Horizontality Original Lateral Continuity Inclusion of Components Cross Cutting Relationships Uniformitarianism Fossil Succession Biological Evolution Plate Tectonics