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Structural features.
- coastal plains are depositional plains along the peninsular coast
- They are younger and will have alluvium
- Predominantly river in aluvium and less marine alluvium
| Western coast | Eastern coast |
|---|---|
| Narrow. | broader. |
| short swift streams that don't carry enough sediments | Because bigger rivers more sedimentation |
| steep slope. Sediments don't accumulate | gentler slopes. So sediments accumulate |
| rivers terminate at estuaries | rivers terminate at delta |
| favourable location for ports | not favourable for ports because Eastern coast require continuous maintenance and dredging |
Genesis.
- eastern and western coastal plains are mostly composite plains.
- composite planes have features of submergent emergent and features of neutral coastline.
- Malabar - emergent smoother lagoons. Vembanad lagoon, ashtamudi lagoon Kollam
- Canara Karnataka - submergent coast
- Konkan - submergent and emergent
- Kathiyawar - submergent and emergent
- Coromandel - emergent lagoon pulicat lagoon
- Andhra - submergent
- Odisha - emergent chilika lake shot Island wheeler Island kalam Island
- Bengal coast - evidences of river rejuvenation
Coastal Plains
- Depositional plains along the peninsular coast
- Younger and have alluvium (Riverine alluvium - (predominant) and Marine alluvium)
| EASTERN COASTAL PLAINS | WESTERN COASTAL PLAINS | |
| Width | Broad | Narrow |
| Rivers | Large hence more sedimentation | Short swift streams |
| Slope | Gentle So Sediments accumulate | Steep Fewer sediments |
| Ports | Deltaic deposits Not favorable to Ports Require continuous maintenance & Dredging | Rivers terminate @ Estuaries Good location for ports |
| Genesis | Composite Plains - (Submergent + Emergent + Neutral) COROMANDEL -Emergent - Lagoons (Pulicat lagoon ) ANDHRA COAST - Submergent ODISHA COAST - Emergent - Chilka lake - Shortt Island, Wheeler Island (Kalaam Island) BENGAL COAST - Evidence of River rejuvenation - IMTR (Interim Missile Test Range) | Composite Plains - (Submergent + Emergent + Neutral) MALABAR - Emergent, Smoother - Lagoons - Wayambanad lagoon & Kollam / Ashtamudi lagoon KARNATAKA / CANARA - Submergent KONKAN - Submergent and Emergent KATHIAWAR - Submergent and Emergent |