With the aid of well labeled diagrams, describe the formation of: i) A Barchan (ii) Rock pedestal (iii) An oasis

      

With the aid of well labeled diagrams, describe the formation of:
i) A Barchan
(ii) Rock pedestal
(iii) An oasis

  

Answers


sharon
i) A Barchan
g41820191032.png
- An obstacle on path of wind e.g. rock/ bush block wind causing deposition
- Materials continue to built until windward side is smooth and leeward side steep forming
a moon shaped feature called barchan

(ii) Rock pedestal
g41820191034.png

(iii) An oasis
g41820191035.png
- Pre- existing depression/ localized fault attacked by wind eddies
- Depression is excavated by removal of unconsolidated materials/ wind erosion by
deflation
- When water bearing rock is reached/ aquifer water oozes out to collect in depression
and an oasis is formed

sharon kalunda answered the question on April 18, 2019 at 07:36


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