The side blocks in faulted mountains may be of mountainous heights. Horst and Graben are often complimentary structures. This type of mountains are typical in occurrence in Basin and Range province of U.S.A.

The term mountain range is used for a linear ridge type mountainous structure characterized with two slopes on opposite sides and commonly (not necessarily) culminating in peaks.

The nature of valley profile at any section in course of a river depends on ratio Incision: Denudation operating in that section. Three broad cases may be considered. Saw cut valleys; V-shaped valleys and flat-floored valleys.

Lake Superior is crescent shaped and is considered as largest fresh-water lake, area wise (82,477 km2), whereas lake Baikul is considered as deepest fresh-water lake with greatest volume (23,000 km2) of water in it.

The folded mountains are also called as complex mountains. During and after ir formation, se mountains have been repeatedly, bent, wrapped and faulted leading to present day most complicated structures exhibited by m.

The biggest lake, Caspian Sea, is a lake belonging saline type. In or cases, salinity of lake is easily attributed to dry climate, which causes precipitation of salts that form layers along bottom and banks of lakes.

Incision is down-cutting along base of channel by river itself and denudation is modification of valley walls by undercutting, wearing and erosion.

When incision becomes negligible and denudation of slopes is major process, result is a flat-floored valley. It is common profile of a valley in lower reaches of a river.

Tectonic mountains owe ir origin to severe intern forces oregenic forces arising from within Earth. These mountains are most common in geographic distribution and often very complicated in geological structure.

A valley, in geomorphic sense, is a depression or hollow of considerable area extent surrounded on side by two or more elevated tracts. Valleys may be result of age-long erosion along medial parts of elevated tracts, or, se might have been produced from a gradual or abrupt subsidence.