Competitive Exams: Plate Tectonics Basics Geography Notes on Introduction
Doorsteptutor material for competitive exams is prepared by world's top subject experts: get questions, notes, tests, video lectures and more- for all subjects of your exam.
Get video tutorials on geography @ Youtube Examrace Channel
Plates: Broad rigid segments of lithosphere that floats on the underlying Asthenosphere.
- Thickness: 100 - 150 km Tectonic activity - Breaking and bending of lithosphere and boundary interactions between plates.
- Plate tectonics: Scientific achievement of the decades of 1960s.
- Based upon 2 concepts -Continental drift and Sea floor spreading.
- Term ‘PLATE’ - 1st used by Canadian Geophysicist J. T. Wilson (1965) .
- W J Morgan and Le Pichon elaborated the concept of plate tectonics in 1968.
- The concept is based upon the theories of continental drift, paleomagnetism and sea-floor spreading.