1. SIR C R REDDY (A) COLLEGE
DEPARTMENT OF GEOLOGY T.SAI UMAMAHESWAR RAO III-B.Sc ( )

2. SEAS AND OCEANS

3. >Seas and oceans occupy nearly 72% of land area
>Seas and oceans occupy nearly 72% of land area. >They generally narrow towards north. >Seas are a part of oceans.

4. Some of the landforms of the these are.

5. BAY It’s body of water, mostly surrounded by land

6. GULF It’s an intrusion into the land

7. INDIA has Indian ocean, Arabian sea, Bay of Bengal, Gulf of mannar etc

8. Major oceans of the world are PACIFIC,INDIAN,ARCTIC AND ATLANTIC OCEANS

9. DIFFERENCE BETWEEN SEAS AND OCEANS
SEA IS A SUB PART OF THE OCEAN.
SEA IS SMALLER THAN OCEAN.
RELATIVELY NOT MUCH DEEPER
OCEAN IS LARGE BED OF SEA THAT IS SPREAD WHILE SEA IS A SMALL PART OF THE OCEAN.
OCEAN IS A BODY OF SALT WATER THAT COVERS 71% OF THE EARTH.
MUCH DEEPER THAN THE SEAS.

10. 1.EPERIC SEA 2.MARGINAL SEA 3.RELICT SEA
There are 3 types of seas
1.EPERIC SEA
2.MARGINAL SEA
3.RELICT SEA

11. 1. EPIRIC SEA “EPIRIC” is a Greek word which means continent
1.EPIRIC SEA “EPIRIC” is a Greek word which means continent They are mostly surrounded by land Ex:Baltic sea

12. 2.MARGINAL SEA Marginal seas will be on continental shelf having connection with the ocean Ex:Yellow sea of China

13. 3.RELICT SEA These are the parts of the oceans in the past, now cut off by Earth movements. Ex:Caspian sea

14. NaCl will be 80% of the salts.
COMPOSITION OF THE SEA
The sea water will have 3.5% of salt, having minerals NaCl,MgCl3 ,MgSO4,CaSO4(OH),CaCO3 etc.,
NaCl will be 80% of the salts.

16. Rivers ‘ill add these salts to seas
Rivers ‘ill add these salts to seas. In sea water we can see the minor compounds of FLOURINE,BORON,COPPER,IRON,SILVER and etc.,

17. The ocean floor has different characters and depth zones. They are
1.Littoral zone
2.Neritic and Continental shelf zone
3.Continental slope zone and
4.Abyssal zone

18. 1.MARINE EROSION, 2.TRANSPORTATION, 3.DEPOSITION.

19. 1.EROSION involves breaking of Sea Shore

20. Wave action is possible up to 700 ft.

21. EROSION DEPENDS UPON THE FOLLOWING FACTORS
1.NATURE OF THE COAST
2. NATURE OF THE ROCKS
3.CHEMICAL ACTION OF SEA WATER
4.ROCK PARTICLES IN SEA WAVES
5.WAVE STRENGTH

22. 2.TRANSPORTATION is the material carried by the sea
Transport of the material is by suspension and in solution.
These rock materials may react with the sea water.
These material is carried parallel to the Shore.

23. PITS AND BARS ARE FORMED
SPITS
BARS

24. EXAMPLES
CHILKA LAKE,ODISHA
PULICAT LAKE,A.P

25. THE ERODED MATERIAL ACCUMULATES AND HELPS IN NEW LAND FORMATIONS
3. CONSTRUCTION
THE ERODED MATERIAL ACCUMULATES AND HELPS IN NEW LAND FORMATIONS

26. SOME OF THEM ARE SPITS BARS HOOKS TOMBOLO SEA CAVES BLOW HOLES
SEA CANYONS

27. SPITS

28. BARS

29. HOOKS

30. TOMBOLO

31. SEA CAVES

32. BLOW HOLES

33. SEA CANYONS