12. Evidences
• Geological Evidence: Edges of continents fit like a
jig-saw
• Biological Evidence: Fossils & Imprints of plants
• Climate Based Evidence: Glaciation
18. What’s wrong with Wegener’s theory
of Continental Drift?
• Continents do NOT move.
19. What’s wrong with Wegener’s theory
of Continental Drift?
• Continents do NOT move.
• It is the tectonic (crustal) plates that consist of both
oceanic and continental crusts that moves.
22. Tectonic Plates vs.
Plate Tectonics
• Tectonic (Crustal) Plates:
• Consist of both continental and oceanic crusts.
23. Tectonic Plates vs.
Plate Tectonics
• Tectonic (Crustal) Plates:
• Consist of both continental and oceanic crusts.
• Plate Tectonics:
24. Tectonic Plates vs.
Plate Tectonics
• Tectonic (Crustal) Plates:
• Consist of both continental and oceanic crusts.
• Plate Tectonics:
• How plates move
25. Tectonic Plates vs.
Plate Tectonics
• Tectonic (Crustal) Plates:
• Consist of both continental and oceanic crusts.
• Plate Tectonics:
• How plates move
• Why they move
26. Tectonic Plates vs.
Plate Tectonics
• Tectonic (Crustal) Plates:
• Consist of both continental and oceanic crusts.
• Plate Tectonics:
• How plates move
• Why they move
• How the movement changes the physical
landscape
52. 1. Constructive Plate
Boundaries
• Case #1: Oceanic-Oceanic
Crusts
• Ridges.
• Eg. Mid-Atlantic Ridge
• Sometimes lava fountains are
found in the middle of the
ridges.
57. 1. Constructive Plate
Boundaries
• Case #2: Continental-
Continental Crusts
• Rift Valleys
• Eg. East African Rift Valley
58. 1. Constructive Plate
Boundaries
• Case #2: Continental-
Continental Crusts
• Rift Valleys
• Eg. East African Rift Valley
• Magma rises and squeezes through
the widening cracks, sometimes to
erupt and form volcanoes.
59. 1. Constructive Plate
Boundaries
• Case #2: Continental-
Continental Crusts
• Rift Valleys
• Eg. East African Rift Valley
• Magma rises and squeezes through
the widening cracks, sometimes to
erupt and form volcanoes.
• The rising magma puts more
pressure on the crust to produce
additional fractures and, ultimately,
the rift zone.