Use Google Earth. Paste the location that is given into the...

Use Google Earth. Paste the location that is given into the "Search" box. Examine each location at multiple eye altitudes and differing amounts of tilt. For any measurements that use the ruler tool, this can be accessed by clicking on the ruler icon above the image. Search for $412430.77 \mathrm{~N} 1221146.23 \mathrm{~W}$ and zoom to an eye altitude 50, ooo feet. What type of drainage pattern is present in this area? a. Trellis b. Dendritic c. Rectangular d. Radial e. Deranged

Use Google Earth. Paste the location that is given into the "Search" box. Examine each location at multiple eye altitudes and differing amounts of tilt. For any measurements that use the ruler tool, this can be accessed by clicking on the ruler icon above the image.
Search for $412430.77 \mathrm{~N} 1221146.23 \mathrm{~W}$ and zoom to an eye altitude 50, ooo feet.
What type of drainage pattern is present in this area?
a. Trellis
b. Dendritic
c. Rectangular
d. Radial
e. Deranged

Key Concepts

Drainage Patterns

Drainage patterns describe the geometric configuration of stream networks within a drainage basin. They are used in geomorphology and hydrology to analyze how topography, underlying geology, and structural controls influence the movement of water within a landscape.

Dendritic Drainage Pattern

A dendritic drainage pattern resembles the branches of a tree and is common in regions where the rock substrate is relatively uniform and unstructured. This type of pattern develops where water flows freely, mirroring natural randomness without significant control from geological structures.

Trellis Drainage Pattern

Trellis drainage patterns occur in areas with alternating bands of resistant and weaker rock types. The streams typically follow a pattern of parallel channels with short tributaries joining at angles, reflecting the underlying structural control of folded or layered sediments.

Rectangular Drainage Pattern

Rectangular drainage patterns emerge in landscapes where jointing or faulting in the underlying rock creates a grid-like influence on stream directions. Streams in this pattern tend to have abrupt, often right-angle turns as they follow the underlying fractures.

Radial Drainage Pattern

In a radial drainage pattern, streams radiate outward from a central elevated feature such as a dome, volcano, or hill. This pattern reflects the influence of a central topographic high point controlling the direction of water flow away from it.

Deranged Drainage Pattern

Deranged drainage patterns are typically found in areas where glacial processes have disrupted pre-existing drainage systems. These patterns lack an organized structure, often resulting in a chaotic network of channels due to rapid and uneven melting or deposition.

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