CONE
horn
deformation
Glacial horn
This is false,cirques are caused when erosion at the beginning of a glacier wears down the walls of mountain peaks.Over time,this process creates bowl-shaped basins called cirques.
horn
Look at textbook EARTH SCIENCE pg: 198-200
Arêtes can form in two ways. They can form when two glaciers erode parallel U-shaped valleys, or they can form when two glacial cirques erode headwards toward one another, although frequently this results in a saddle-shaped pass, called a col.
Ussually by three cirques A cirque is an origin point for glaciers in mountainous areas. It is a deep depression with three high walls and an open area from which the glacier moves forward, down the mountain side. Over time, as rock is eroded, these become wider and deeper. A mountain horn, such as the Matterhorn in the Alps forms when a peak is surrounded on two or more sides by cirques. As the cirques expand and rock is eroded the peak is honed into a point, forming a horn.
Answer: Cirques
The matterhorn is an arete or pyramidal peak. Formed as three glacial cirques erode back into mountainside.
An arête is a thin ridge of rock which is formed when two glaciers erode parallel U-shaped valleys. The arête is a thin ridge of rock that is left separating the two valleys Arêtes can also form when two glacial cirques erode head wards towards one another, although frequently this results in a saddle-shaped pass, called a col. The edge is then sharpened by freeze-thaw weathering. Where three or more cirques meet, a pyramidal peak is created. - (a famous example is the 'Matterhorn'). Form the above it must be clear that arêtes are landforms found in mountainous terrains that have been subject to glaciation. They are therefore very common in the Alps.
Wind can erode topsoil.Drugs erode family values.