World Geography

Alluvial Fans An alluvial fan is a cone-shaped depositional landform built up by streams, heavy with sediment load. Alluvial fans are formed when streams flowing from mountains break into foot slope plains of low gradient. Normally a very coarse load … Continue reading →

River Valleys The extended depression on the ground through which a stream flows throughout its course is called a river valley. At different stages of the erosional cycle, the valley acquires different profiles. Valleys start as small and narrow rills. … Continue reading →

Youth Stage Streams are few during this stage with poor integration and flow over original slopes. Downcutting predominates over lateral corrasion. Major features are V-shaped valleys, gorges, canyons, waterfalls, and rapids. Mature Stage Streams are plenty with good integration. Lateral … Continue reading →

Definition Fluvial landforms are those generated by running water, mainly rivers. Process Involved Hydration: The force of running water wearing down rocks. Corrosion/Solution: Chemical action that leads to weathering. Attrition: It involves wear & tear of transported material among them … Continue reading →

Weathering What is it?: Weathering denotes the process of wearing, breaking up, and fragmentation of the rock that creates the surface of the ground and remains exposed to the weather. It is an In Situ disintegration or breakdown of rock … Continue reading →

Exogenic Forces Exogenic forces or external forces are forces that draw their power from the earth’s exterior or arise within the earth’s atmosphere. The action of exogenic forces results in the wearing down of landforms. Temperature and precipitation are the … Continue reading →

Intrusive Forms The lava that is discharged during volcanic eruptions on cooling develops into igneous rocks. The cooling may take place either on arriving at the surface or also while the lava is still in the crustal portion. According to … Continue reading →

Super Volcanoes A supervolcano is a large volcano in which the volume of magma deposits that can erupt to the surface is greater than 1,000 cubic km. Supervolcanoes occur when a large volume of magma accumulates under the lithospheric plate … Continue reading →

Hotspot Volcanism Hotspot volcanism is a type of volcanism that typically occurs at the interior parts of the lithospheric plates rather than at the zones of convergence and divergence (plate margins). Hotspot volcanism occurs due to abnormally hot centres in … Continue reading →