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TNPSC Current Affairs March 2017 10 for Group 1 and 2 Mains

TNPSC Current Affairs March 2017      

New Canyon found in In Bay of Bengal Close to Kovvda, Andhra Pradesh

  
Three New Canyon has been found by Scientists of CSIR-National Institute of Oceanography (NIO). It found in the depths of Bay of Bengal close to Kovvada in Srikakulam District, Andhra Pradesh. It is Very huge Canyon and probably formed from river Kandivalasa     

This is the first time in 50 years, scientist has been clearly mapped the Ocean floor between Vishakhapatnam  and Srikakulam by sending 32 high density beams to depth of sea.
The Last Canyon system discovered in Vishakhapatnam is on 1963 by American Geologist E.C Lafond.

What is Canyons and how it Formed?

Canyons are deep narrow valley which is formed by movement of rivers, processes of weathering, erosion and by tectonic activity.

The Most familiar type of canyon is river Canyon. The water pressure of a river cut deep into a river bed and carries the sediments downstream creating a deep , narrow channel.
Canyons are characterised by steep step-like slide slopes and may be as deep as a Gorge. Gorge is almost has equal width in top and in bottom, but canyon is wider at top than at bottom. Canyons form in horizontal bedded sedimentary rocks and gorges from hard rocks

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