What is weathering?
Weathering breaks down or alters rock in place, without moving it.
Study 4 Landform Development and Surface Processes with 12 free online flashcards. Review key terms, definitions, and concepts with this interactive flashcard deck.
What is weathering?
Weathering breaks down or alters rock in place, without moving it.
How do mechanical and chemical weathering differ?
Mechanical weathering fragments rock without changing its mineral composition; chemical weathering changes or dissolves minerals.
What does erosion do?
Erosion removes material from a surface; in everyday earth science usage, it often includes moving that material.
When does deposition occur?
Deposition happens when a transporting agent can no longer carry its sediment load, or conditions favor sediment accumulation.
How do erosion and deposition differ across a meander bend?
Faster flow along the outside of a bend erodes a cut bank; slower flow along the inside deposits sediment in a point bar.
How does an oxbow lake form?
An oxbow lake forms when a river cuts through a narrow meander neck, leaving the abandoned bend separated from the channel.
How do natural levees form?
During floods, water spills over riverbanks and deposits sediment across the floodplain; repeated deposition can build natural levees.
What is longshore sediment transport?
Longshore sediment transport is the movement of sediment parallel to the coast, carried by longshore currents created by angled waves.
How does glacial abrasion erode bedrock?
Glacial abrasion occurs when rock fragments in basal ice grind against the ground, wearing down bedrock.
What is a moraine?
A moraine is a ridge of glacial debris deposited as a glacier melts or retreats.
What is glacial outwash?
Outwash is sediment carried and sorted by meltwater flowing away from a glacier.
How does an alluvial fan form?
An alluvial fan builds when a stream leaves a steep mountain front, loses energy, and deposits sediment.
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