- Origin of Plains
- The most acceptable version of the origin of plains is that of Edward Suess and his idea of fordeep.
- The northern part of the peninsular plateau underwent a northward bend and under the thrust of the Eurasian plate created the depression that accumulated the sediments brought by the Ganga, Indus, and Brahmaputra river systems.
- Extends: East to the west.
- Average Width: 150 to 300km
- Average Depth: 1000 to 2000m