can usually be found in the upper and middle course of a river. They are found when a river runs over alternating layers of hard and soft rock. As the water moves over the hard rock it will be ...

At 4,130 miles (6,650 km) long, the Nile in Africa is the longest river in the world. Some people consider the Amazon in South America to be longer. This is because the many hundreds of channels ...

Many of the geomorphic topics of interest include the landforms and processes associated with rivers, glaciers, landslides, beaches and arid regions. Fluvial geomorphology relates to the study of ...