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It is known as moraine.
It forms a ridge called moraine
Because it is
At the western edge of the Nazca plate and the eastern edge of the Pacific plate lies the East Pacific Rise. The East Pacific Rice is known as a mid-ocean ridge, formed from a divergent boundary.
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.
An arête is typically formed when two glaciers erode parallel U-shaped valleys. The arête is a thin, sharp ridge of rock that is separating the two valleys.
The ridge formed from till deposits at the edge of a glacier is called a moraine. It may be formed from glacial flours or from large boulders.
a ridge
moraine
it might be good at this point to differentiate between the two term incisal ridge and incisal edge the incisal ridge is that portion of the crown which makes up the complete incisal portion. when and incisor is newly erupted , the incisal portion is rounded and merges with the mesioincisal and distoincisal angles and the labial and lingual surfaces. this ridge portion of the crown is called the incisal ridge. the term edge implies an angle formed bye the margin of two flat surfaces. therefore an incisal edge does not exist on an incisal until occlusal wear has created a flatten surface linguincisally, which surface forms an angle with a labial surface. the incisal edge is formed by the junction of the linguincisal surface, sometimes called the incisal surface, and the labial surface. Wheeler's Dental Anatomy Physiology and occlusion Ninth edition
ridge, edge,top
The synonym for ledge is shelf or sill.
Melton Hill Lake is on the eastern edge of Oak Ridge, Tennessee.
Moraine.
Moraine
It is on the edge not very close by the mantle plumes
contour line