Which of the following landforms is/are associated with upper course of rivers?

Potholes

Interlocking spurs

Peneplains

Gorges

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Question

The kettle-like small depressions in the rocky beds of the river valleys are called potholes which are usually cylindrical in shape. Potholes are generally formed in coarse-grained rocks such as sandstones and granites.
As the river erodes the landscape in the upper course, it winds and bends to avoid areas of hard rock. This creates interlocking spurs, which look a bit like the interlocking parts of a zip.
Peneplains represent low featureless plain having undulating surface and remnants of convexo-con- cave residual hills. These are, in fact, the end products of normal cycle of erosion. This refers to an undulating featureless plain punctuated with low-lying residual hills of resistant rocks. It is considered to be an end product of an erosional cycle.
A gorge is a deep valley with very steep to straight sides. A gorge is almost equal in width at its top as well as its bottom. It is formed in hard rocks.

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The kettle-like small depressions in the rocky beds of the river valleys are called potholes which are usually cylindrical in shape. Potholes are generally formed in coarse-grained rocks such as sandstones and granites.
As the river erodes the landscape in the upper course, it winds and bends to avoid areas of hard rock. This creates interlocking spurs, which look a bit like the interlocking parts of a zip.
Peneplains represent low featureless plain having undulating surface and remnants of convexo-con- cave residual hills. These are, in fact, the end products of normal cycle of erosion. This refers to an undulating featureless plain punctuated with low-lying residual hills of resistant rocks. It is considered to be an end product of an erosional cycle.
A gorge is a deep valley with very steep to straight sides. A gorge is almost equal in width at its top as well as its bottom. It is formed in hard rocks.