The South Deccan consists of three parts – Karnataka Plateau, Telangana Plateau and Tamil Nadu Uplands.
Karnataka Plateau –
The plateau spans in the state of Karnataka and the Cannanore and Kozhikode district of Kerala.
The plateau has an average elevation of 600 – 900 m.
The Northern upland of Karnataka plateau is called Malnad while the Southern part is called Maidan.
It is drained by Kaveri and Tungabhadra rivers.
The Telangana Plateau –
The plateau of Telangana consists of Dharwar and Cuddapah rock formations.
Hyderabad is situated on Telangana plateau.
The Tamil Nadu uplands –
This lies between the South Sahyadris and Tamil Nadu coastal plains.
It is largely covered by Archean Rocks. At places there are Cuddapah and Alluvial Formations.
Between Coimbatore and Annamalai, there is a broad gap, known as Palakkad Gap. This is about 25 km wide and connects Kerala coast and Tamil Nadu highlands.
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