Answer: Option [D]Stacks are formed by Wave erosion. 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.
Answer: Option [B]The longitudinal deposits in the tunnel under a glacier are called Eskers. Eskers are ridges made of sands and gravels, deposited by glacial meltwater flowing through tunnels within and underneath glaciers, or through meltwater channels on top of glaciers. Over time, the channel or tunnel gets filled up with sediments.
Answer: Option [A]The correct answer is Cavern. Dripstone (flowstone, speleothem) Calcium carbonate rock deposited in caves by the precipitation of calcite from water as excess dissolved carbon dioxide is diffused into the atmosphere. Dripstone takes various forms, including stalactites, helictites (having spiral form), curtains, ribbons, and stalagmites.
Answer: Option [B]Glacial erosion is responsible for the formation of Saddles. Glacial erosion is responsible for the formation of the cirque. They form by the accumulation of snow and ice which is transported through the process of glacial erosion.
Answer: Option [D]‘Knock – and – lochan’ topography is associated with glaciation in lowland area. knock and lochan Term descriptive of a glaciated landscape of low relief which is made up of ice-moulded hillocks and intervening lochans (small lakes) eroded along zones of rock weakness. It is especially well developed in the Lewisian gneiss area of the coastal lowlands of north-western Scotland.