What geological feature is described as a winding ridge formed by unassorted depositions of rock, gravel, clay, etc., running along a glacier in a till plain and is often utilized for road construction?
Answer is: b) Esker
Detailed Explanation: An esker is a geological landform that results from the
deposition of sediments by a subglacial or englacial stream flowing beneath a
glacier. It is a winding ridge composed of unassorted materials such as rock,
gravel, clay, and sand. Eskers typically run along the path of a glacier in a till
plain, representing the course of ancient meltwater channels.
The formation of an esker begins with the deposition of sediment by glacial
streams that flow within, beneath, or on the surface of the ice. As the glacier
melts, the sediments are left behind, creating a long, sinuous ridge. Eskers often
resemble embankments and may reach considerable heights.
One notable characteristic of eskers is their utility for human activities. Due to
their elongated and stable nature, eskers are often used for making roads. The
ridge-like structure provides a natural foundation for constructing transportation
routes, and their stability makes them suitable for roadbuilding
