ICSE Class 6 Answered

Erosional Plains: These are formed due to the agents of degradation. Some of the erosional plains are:

• Peneplains: These plains are formed due to the wearing and tearing of hills by agents of gradation on a piece of a land. Niagara Plains in the USA and the Lorrain in France are some examples of this type of plains. 
• Plains of Glacial Erosion: These plains have rounded peaks. Some examples are Srinagar in India and North West Eurasia.
• Karst Plains:These plains are formed due to the chemical weathering of the limestone landscape with water. Examplesare,Krast region of Serbia and Montenegro.

Depositional Plains: These plains are formed due to the depositional activities of the agents of gradation. These are:

• River Deposition: These are formed due to the depositional activities of river water. Rivers deposit various sediments on land. The Great Northern Plains of India and the deltaic plains in Egypt are examples.
• Wind Deposition: These plains are formed due to the erosional and depositional activities of sand. They have an irregular surface. Example- Loess plains in China.
• Marine Deposition: These plains have been formed due to the depositional activities of seas. These plains are generally found in the coastal regions. The east coast of India and the coasts of Germany and Denmark are some examples.