Updated By: LatestGKGS Desk
Drainage Patterns Types, Features, Causes, Formation
Drainage Patterns Types, Features, Causes, Formation, Trellis, Rectangular, Parallel, Radial and, Angular Drainage Patterns detail
Drainage pattern a pattern created by stream erosion over time that reveals characteristics of the kind of rocks and geologic structures in a landscape region drained by streams.
The main types of drainage patterns:-
Dendritic patterns, which are by far the most common, develop in areas where the rock (or unconsolidated material) beneath the stream has no particular fabric or structure and can be eroded equally easily in all directions.
Trellis drainage patterns typically develop where sedimentary rocks have been folded or tilted and then eroded to varying degrees depending on their strength.
Rectangular patterns develop in areas that have very little topography and a system of bedding planes, fractures, or faults that form a rectangular network.
A parallel drainage is a pattern of rivers caused by steep slopes with some relief. Because of the steep slopes, the streams are swift and straight, with very few tributaries, and all flow in the same direction.
Radial system, the streams radiate outwards from a central high point. Volcanoes usually display excellent radial drainage. Other geological features on which radial drainage commonly develops are domes and laccoliths.
Angular drainage patterns form where bedrock joints and faults intersect at more acute angles than rectangular drainage patterns. Angles are both more and less than 90 degrees.
