Match each specified drainage pattern with its underlying geological control or characteristic landform surface.
- Trellis drainage patternForms in folded strata with alternating parallel belts of hard and soft rock layers.
- Rectangular drainage patternDevelops along faulted, jointed, or fractured bedrock, causing streams to make sharp right-angled bends.
- Radial drainage patternFlows outward away from a central elevated high point, such as a volcanic cone or isolated dome.
- Dendritic drainage patternResembles the branching structure of a tree, forming on rocks with uniform resistance to erosion.
Answer
Trellis drainage pattern matches with folded strata containing alternating hard and soft rocks; Rectangular pattern matches with faulted and jointed bedrock; Radial pattern matches with outward flow from a central dome or volcano; Dendritic pattern matches with tree-like branching on uniform rock resistance.
Each pattern corresponds directly to its bedrock control: Trellis requires alternating soft/hard folded belts, Rectangular follows structural joints and faults, Radial descends from a central highland dome or cone, and Dendritic branches randomly over uniform lithology.
Step-by-Step Solution
Key Concept
Geological Controls on Drainage Network Patterns