01
Front
What causes sediment deposition?
Back
Deposition occurs when a transporting agent loses enough energy that it can no longer carry some of its sediment load.
Free Online Flashcard Deck
3 Deposition and Sedimentary Landforms Free Online FlashCards
Study 3 Deposition and Sedimentary Landforms with 12 free online flashcards. Review key terms, definitions, and concepts with this interactive flashcard deck.
12 cards
02
Front
What factors influence which sediment grains settle first?
Back
Settling depends on grain size, density, shape, and flow conditions—not grain size alone.
03
Front
What is a graded deposit?
Back
A graded deposit has coarser grains at the bottom, overlain by progressively finer grains.
04
Front
What may happen when a flood or debris flow stops suddenly?
Back
A sudden loss of transport energy, such as when a flood or debris flow stops, can deposit a mixture of grain sizes at once.
05
Front
What does sorting describe, and what is a well-sorted deposit?
Back
Sorting describes how similar or varied the grain sizes are. A well-sorted deposit contains grains of roughly similar size.
06
Front
What can sorting reveal—and what can it not determine by itself?
Back
Sorting can provide clues about how sediment was transported and deposited, but it does not identify an environment by itself.
07
Front
What is sedimentation?
Back
Sedimentation is the settling and accumulation of sediment, often in layers called beds.
08
Front
How does a delta form?
Back
A delta forms where a river enters a standing body of water, slows, and deposits sediment. Its channels may divide and shift as it grows.
09
Front
How do rivers build floodplains and bars?
Back
Floodplains and bars develop as rivers deposit sediment during floods or where currents weaken within channels.
10
Front
How do waves and wind create beaches and dunes?
Back
Waves and wind redistribute and sort sediment, forming beaches along coasts and dunes across dry surfaces.
11
Front
What does compaction do to buried sediment?
Back
As sediment is buried beneath newer deposits, pressure compacts it and reduces the pore spaces between grains.
12
Front
What characterizes a poorly sorted deposit?
Back
A poorly sorted deposit contains a wide range of grain sizes. Rapid deposition from a landslide or debris flow commonly produces one.
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