The formation and deformation of earth's crust. The lithosphere is not a homogeneous unit. It is divided in to multiple plates. The internal heat process, the convection process affects the plate tectonics.

1. PLATE TECTONICS

2. AIM

3. SCOPE & SEQUENCE
Internal Heat Source
& Plate Tectonics
Continental Drift &
Sea Floor Spreading
Plate Boundaries &
Subduction Zones

4. INTERNAL HEAT SOURCE
Dynamic Planet Earth itself is a Giant Heat Engine
 Primordial Heat Accumulated During Earth Formation
 Radioactive Heat- Isotopes Disintegration- Uranium, Thorium & Potassium
 Equilibrium of Constructive & Destructive Heat
 Convection and Conduction Process

5. PLATE TECTONICS
 Convection causes slow mvt of Asthenosphere to Diff Directions and
Lithosphere Break to Multiple Plates
 Greek- Tektonikos means Building & Construction. It is the study of the
Formation & Deformation of Earth’s Crust which results in large scale features
1
2
3 4
5
6
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6. CONTINETAL DRIFT
200 Millions years ago. Pangaea started
break up
100 – 50 Millions years ago
50 Millions years ago to present
Laurasia
Gondwana

7. SEA FLOOR SPREADING

8. TYPES OF PLATE BOUNDARIES

9. SUBDUCTION ZONES
Oceanic + Oceanic Plates Continental + Continental Plates
Oceanic + Continental Plates

10. REFERENCES
Bhattarai, T. N. and Rai, S.M., 2014, Fundamental of Geological Excursion and
Field Work. Publisher Rishika Bhattarai and Ladipma Rai, Kathmandu,196 p.
Bhattarai, T. N. (2018, January). Introduction to Plate Tectonics. Power Point presented at the
Classes on Geological Processes and Natural Hazards, Samarpan Academy Dhumbarahi,
Kathmandu.
Images of Continental plates - Google Search. (n.d.). Retrieved January 14, 2018, from
https://www.google.com.np/search?q=Images+of+Continental+plates&rlz=1C1NDCM_enNP
754NP754&tbm=isch&tbo=u&source=univ&sa=X&ved=0ahUKEwjMu6in0tbYAhVKro8KH
ZArBLcQsAQIIw&biw=1366&bih=637

11. Queries ?
Comments !