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  2. Alluvial fan - Wikipedia

    en.wikipedia.org/wiki/Alluvial_fan

    Alluvial fans are common in the geologic record, such as in the Triassic basins of eastern North America and the New Red Sandstone of south Devon. Such fan deposits likely contain the largest accumulations of gravel in the geologic record. Alluvial fans have also been found on Mars and Titan, showing that fluvial processes have occurred on ...

  3. Glossary of landforms - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_landforms

    Alluvial fanFan-shaped deposit of sediment; Anabranch – A section of a river or stream that diverts from the main channel and rejoins it downstream. Arroyo – Dry watercourse with flow after rain; Asymmetric valley – Valley that has steeper slopes on one side; Backswamp – Environment on a floodplain where deposits settle after a flood

  4. Tectonic influences on alluvial fans - Wikipedia

    en.wikipedia.org/wiki/Tectonic_influences_on...

    The shape of alluvial fans is mostly influenced tectonically. An alluvial fan can be completely changed due to orogenic thrusting. [4] An alluvial fan could have been deposited and formed outside of a mountain range, however, thrusting of the mountain belt could cause the alluvial fan to become broken up by the new mountain forming.

  5. Glossary of geology - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_geology

    alluvial fan A fan-shaped deposit formed where a fast flowing stream flattens, slows, and spreads typically at the exit of a canyon onto a flatter plain. alluvium Soil or sediments deposited by a river or other running water. amber Fossilized resin or tree sap that is appreciated for its vivid colour, usually reddish-orange to gold or yellow ...

  6. Depositional environment - Wikipedia

    en.wikipedia.org/wiki/Depositional_environment

    Alluvial – Loose soil or sediment that is eroded and redeposited in a non-marine setting – type of Fluvial deposit. Caused by moving water in a fan shape (Alluvial Fan) and containing mostly impermeable and nonporous sediments well sorted. Aeolian – Processes due to wind activity. Often in deserts and coastal regions and well sorted ...

  7. Conglomerate (geology) - Wikipedia

    en.wikipedia.org/wiki/Conglomerate_(geology)

    Fanglomerates are poorly sorted, matrix-rich conglomerates that originated as debris flows on alluvial fans and likely contain the largest accumulations of gravel in the geologic record. [4] Breccias are similar to conglomerates, but have clasts that have angular (rather than rounded) shapes.

  8. Bajada (geography) - Wikipedia

    en.wikipedia.org/wiki/Bajada_(geography)

    These fan-shaped deposits form by the deposition of sediment within a stream onto flat land at the base of a mountain. [1] The usage of the term in landscape description or geomorphology derives from the Spanish word bajada , generally having the sense of "descent" or "inclination".

  9. River delta - Wikipedia

    en.wikipedia.org/wiki/River_delta

    Alluvial fan deltas, as seen by their name, avulse frequently and more closely approximate an ideal fan shape. Most large river deltas discharge to intra-cratonic basins on the trailing edges of passive margins due to the majority of large rivers such as the Mississippi , Nile , Amazon , Ganges , Indus , Yangtze , and Yellow River discharging ...