Geology Exam #4

The lowest elevation to which a stream can erode it channel. Two types: Ultimate Base Level, an Temporary Base Levels

The level of the surface of the ocean relative to the land, halfway between high and low tide.

Precipitation, Evaportation, Infiltration (the movement of water into rocks or soil through crack and pore spaces) and transipiration (the release of water vapor to the atmosphere by plants). *Running water is the single most important agent sculpting Earth's land surface.

Gradient (slope of the stream's channel), shape, size and roughness of the channel, and the streams discharge (amount of water passing a given point per unit of time).

The slope of a stream channel, expressed over a specified distance.

The used most often to compare the size of streams; the volume of water flowing past a certain point in a given unit of time.

A way measure a how a stream maintains a constant slope.

- Streams travel along bends. - Streams meander because erosion occurs on the outside and deposition occurs on the inside.

- A streams ability to accumalate and transport soil and weathered rock is aided by the work of raindrops, which knock sediments loose.

Quarrying, Abrasion, and Corrosion.

The removal of blocks from the bed of the channel.

Process by which the bed and banks of a bedrock channel are ceaselessly bombarded by particles carried in the flow. (Potholes)

A process by which rock is gradually dissolved by the flowing water.

Most common landforms on Earth's surface. It is divided in to 2 types: Narrow V shape valleys, and Wide valleys with flat tops.

- Generally form in arid regions where - dowcutting toward base level is rapid & weathering is slow.