Question

Which of the following is not a Depositional Landform?

निम्नलिखित में से कौन एक निक्षेपण भूमि का रूप नहीं है?

• A. Alluvial Fans
  
  जलोढ़ पंख
• B. Deltas
  
  डेल्टा
• C. Natural levees
  
  प्राकृतिक बाँध
• D. Valleys
  
  घाटियाँ

Answer 1

The correct option is D Valleys


घाटियाँ
Following are the examples of erosional landforms (running water) : Valleys, Potholes and Plunge Pools, Incised or Entrenched Meanders, River Terraces.

Following are the examples of depositional landforms (running water) : Alluvial Fans, Deltas, Floodplains, Natural Levees and Point Bars etc.

Valleys: Valleys start as small and narrow rills; the rills will gradually develop into long and wide gullies; the gullies will further deepen, widen and lengthen to give rise to valleys. Depending upon dimensions and shape, many types of valleys like V-shaped valley, gorge, canyon, etc. can be recognised.

Alluvial Fans: they are formed when streams flowing from higher levels break into foot slope plains of low gradient. Normally very coarse load is carried by streams flowing over mountain slopes. This load becomes too heavy for the streams to be carried over gentler gradients and gets dumped and spread as a broad low to high cone shaped deposit called alluvial fan.
Deltas: they are like alluvial fans but develop at a different location. The load carried by the rivers is dumped and spread into the sea. If this load is not carried away far into the sea or distributed along the coast, it spreads and accumulates as a low cone.

Natural Levees: Natural levees are found along the banks of large rivers. They are low, linear and parallel ridges of coarse deposits along the banks of rivers, quite often cut into individual mounds.

घाटियाँ: घाटियाँ छोटी और संकरी गलियों के रूप में शुरू होती हैं; धीरे-धीरे लंबी और चौड़ी गलियों में विकसित होती चली जाती है ।घाटियों को आयामों और आकार के आधार पर, कई प्रकार की घाटियों जैसे वी-आकार की घाटी, पहाड़ो में संकड़ा पथ घाटी, आदि को पहचाना जा सकता है।