1. READING ASSIGNMENTS - Revised 26 Oct., 2003
7th Edition, 2003, Sverdrup & others, pages correspond to lesson topics in the Study Guide:
Lesson 1 page 2
Lesson 2 p , 45-51
Lesson 8 p (Q7 assigned)
Lesson 3 p (E3 assigned)
Lesson 4 p. 2-21, (Q3 assigned)
Lesson 5 p ; 3(bottom+fig)-4(fig); 259(bottom)-260(top) (Q4 assigned)
Lesson 6 p , 87-89, 364(gases)
Lesson 7 p (top), , (sound),120(bottom)-124 (Q6 assigned)
Lesson 9 p , 101(bathymetry)-112(fig)
Lesson 10 p. “ “ “ “
Lesson 11 p. “ “ “ “ (Q9 assigned)
Lesson 12 p. “ “ “ “ , 107(fig+bottom)-110(top),
Lesson 13 p. “ “ “ “
Lesson 14 p. 112(sediments) (Q11 assigned)
Lesson 15 p
Lesson 37 p , (Q27 assigned)
Lesson 16 p , (E9 assigned)
Lesson 17 p. 64(fig), 66, 73-75, 127(Min Dep), 87, 90-96,
Lesson 18 p , 81(hot spots)-83
Lesson 19 p
Lesson 20 “ “ “
Lesson 21 p , (Q13 assigned)
6th edition, (2000), or 5th edition, (1997) may be used. Ask for handout for pages to be studied.
Test #1
Test #2

2. PLATE TECTONICS A Summary & Review GEOL 1033 Lecture ppt file 103-19)
(Lesson 21)

3. PANGAEA - about 250 Ma ago CONTINENTAL DRIFT THEORY: Wegener, 1915
Laurasia
Gondwanaland
evidence:
geographic fits, similar rocks, similar ages, similar structures, similar fossils, similar climates, similar ancient environments

5. Bullard's STATISTICAL CONTINENTAL FIT
95% fit is excellent

6. ages
basins
structures

7. DISTRIBUTION OF CONTINENTAL FOSSILS
Glossopteris flora of southern hemisphere
Reptile fossils of the southern hemisphere

8. ANCIENT GLACIATIONS
Glacial deposits of southern hemisphere match

9. WEGENER'S BREAKUP OF PANGAEA
Pangaea began to rift & drift apart about 200 Ma ago
Note India

10. OCEANOGRAPHY of 1960’s
supported continental evidence for drift theory:
Seafloor topography
Deep-sea sediments
Micropaleontology
Paleooceanography
Seafloor spreading
Plate tectonics

11. MODEL OF THE SOUTHERN ATLANTIC
Seafloor topography became much better understood

12. PALEOMAGNETISM OF THE OCEAN BASINS
Interpretation of magnetic polar reversals:
Confirms seafloor spreading
Dates ocean basins

13. TRANSFORM BOUNDARIES DISCOVERED
In addition to divergent and convergent zones.
Active:
British Columbia
Southern California
(Passive:
Southern Margin of Grand Banks)
Leading edge continental margins

14. UNDERSTANDING OF THE TRENCH REGIONS OF THE WORLD
Leading Edge Continental Margins

15. Deep-Sea Trenches & their plate tectonic significance
Subduction zones

16. OVERVIEW OF PLATE TECTONIC PROCESSES
Converging zone Diverging zone

17. oceanic ridge Diverging Zone
Transform faults offseting oceanic ridge axis
oceanic ridge Diverging Zone
“ocean to ocean” Converging Zone
“ocean to continent” Converging Zone

18. DRIVING MECHANISM for PLATE TECTONICS is THERMAL CONVECTION in EARTH'S INTERIOR

19. FORMATION OF SEAMOUNTS & TABLEMOUNTS
Thermal contraction of lithosphere once seafloor spreads away from heat source results in subsidence of older seafloor far from spreading ridge

20. SUBSIDENCE OF SEAFLOOR WITH AGE
Topographic data plotted with theoretical models

21. BASAL SEDIMENT AGES
Base of sediments above basalt increase in age away from spreading ridge
Core studies confirmed seafloor spreading

22. FUTURE OF SOUTH ATLANTIC
South America & Africa will continue to separate

23. LITHOSPHERIC PLATE BOUNDARIES
1) Spreading centers (=divergence zones)
Ridges & rises of ocean floors
Shallow earthquakes
Volcanism
New lithosphere formation
2 kinds: Oceanic & continental
2) Transform faults
Lateral translation & shear
Two kinds: active & passive
Some volcanism (active vs. passive)
Shallow earthquakes (active vs. passive)
3) Converging zones
Shallow to deep earthquakes
Subduction & trenches
Volcanism & magmatic arcs (volcanic island arcs & volcanic mountain belts)
Mountain-building
Metamorphism
Plate collisions (3 kinds)

24. 2 KINDS OF Diverging Zones
Oceanic
New
Gulf of Aden
Red Sea rift
Gulf of California
Mature
Mid-Atlantic Ridge
East pacific rise
Juan de Fuca Ridge
Carlsburg Ridge
Continental
East African Rift Valley system
Mesozoic (Triassic-Jurassic) basins of eastern North America

25. 3 KINDS OF PLATE COLLISIONS
3 kinds of lithospheric plate collisions
a) Oceanic to oceanic (western Pacific examples)
b) Oceanic to continental (eastern Pacific examples)
c) Continental to continental (India colliding with southern Asia)

26. PLATE TECTONIC CLASSIFICATION OF CONTINENTAL MARGINS
1) TRAILING EDGE = divergent = passive = aseismic = Atlantic
2) LEADING EDGE = convergent = active = seismic = Pacific
3) TRANSFORM FAULT = translational
Occur along:
trailing edge continental margins and
leading edge continental margins
There are two kinds:
active
passive

27. Trailing Edge Continental Margin
Leading Edge Continental Margin
“head”
“tail”

28. DISTRIBUTION OF PASSIVE CONTINENTAL MARGINS
Trailing Edge Continental Margins

29. FEATURES OF PASSIVE CONTINENTAL MARGINS
sediments
sediments

30. Eastern North America is a trailing edge continental margin

31. WESTERN CANADA HAS A COLLISION/TRANSFORM BOUNDARY
Northern British Columbia:
Active transform fault
Southern British Columbia:
Leading edge continental margin

32. END OF FILE