Landforms and their Evolution Test - 2

Very coarse materials like boulders and blocks along with some minor fractions of rock debris carried into this stream settle in the valley of ice beneath the glacier and after the ice melts can be found as a sinuous ridge called esker.

In the middle stages, streams cut their beds slower, and lateral erosion of valley sides becomes severe.

A stack or sea stack is a geological landform consisting of a steep and often vertical column or columns of rock in the sea near a coast, formed by wave erosion. Stacks are formed over time by wind and water, processes of coastal geomorphology.

Rocks in humid regions are exposed to abundant rainfall and hot temperatures weather much faster than similar rocks residing in cold, dry regions. Hence, the chemical weathering process is more dominant than the mechanical process in humid regions.

A gorge is a deep valley with very steep to straight sides and a canyon is characterised by steep step-like side slopes and may be as deep as a gorge.

Dry hot deserts are good places for sand dune formation. Obstacles to initiate dune formation are equally important. There can be a great variety of dune forms.

In large flood and delta plains, rivers rarely flow in straight courses. Loop-like channel patterns called meanders develop over flood and delta plains.

V- shaped valley is created by soil erosion by the rivers.

Alluvial fans are formed when streams flowing from higher levels break into foot slope plains of low gradient. 

Gradually, most of the surface of the limestone is eaten away by these pits and trenches, leaving it extremely irregular with a maze of points, grooves, and ridges or lapies.