Consider the following statements about gorges and canyons 1 A canyon is a deep valle...........

Geography Earth Geology

Consider the following statements about gorges and canyons

1. A canyon is a deep valley with very steep to straight sides while a gorge is characterized by steep step like side slopes.

2. A canyon is almost equal in width at its top as well as bottom while a gorge is wider at its top than its bottom.

3. Gorges form in horizontally bedded sedimentary rocks while canyons are formed in hard rocks.

Select the correct answer using the codes given below

1 and 2 only

3 only

All of the above

None of the above

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Explanation:

Gorge Canyon

Due to horizontally bedded layers of sedimentary rocks, the erosion profile is not uniform due to different resistance offered by different layers giving rise to canyons.
In the other hand the gorges are found in areas of hard rocks which are equally resistant to erosion and as a result form vertical sides instead of steps.
Also, in canyons the steps are formed due to differential