One of the persistent beliefs about the origin of Kerela is an ancient lore.  Lord Vishnu, the protector in his 6th incarnation as Parashurama slayed 21 evil warriors and after the ferocious battle he prayed to Gods for a secluded place to perform his penance.  The Gods designed to give him the land he chose.  On hearing that, Parashurama threw his axe into the sea in a wide arc and commanded the water in the area to retreat.  The land that rose dripping from the sea became Kerela, the land of prosperity and land of God's

Parasurama - founder of Keralam Parasurama, the short-tempered warrior-sage regarded as the incarnation of Vishnu. After defeating the Kshathriya Kings, the sage approached the wise men for penance. As a Self-mortification he was advised to create a land for Brahmins. He readily agreed and meditated at Gokarnam, (considered to be the end of land). After getting the booms from Varuna, the God of the Oceans and Bhumidevi, the Goddess of earth, he proceeded to Kanya Kumari (Cape Comorin) and threw his battle-axe northwards across the waters. The waters subsided and what was left over was called the land of Parasurama, that is today's Kerala

Geologists have pointed out that the elevation of Kerala from the sea was the result of some seismic activity, either suddenly or gradually. Another Thoughts prevailing in scientific society is the rivers of Kerala emptying into the Arabian seas bring down enormous quantities of silt from the hills. The ocean currents transport quantities of sand towards the shore. The coastal portions could well be due to the accumulation of this silt over thousands of years.