Asked by hghghg
is a canyon formed by erosion weathering or deposition
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Mostly by erosion, with help from weathering.
- Running water (rivers/streams) is the primary agent: it cuts downward (downcutting) and removes rock and sediment, carving deep canyons (e.g., the Grand Canyon by the Colorado River).
- Weathering (physical like freeze–thaw, and chemical) weakens rock and makes it easier for erosion to remove material.
- Tectonic uplift often helps by steepening gradients so rivers can incise faster.
- Deposition plays only a secondary role inside canyons (e.g., alluvial fans, river terraces, or silt deposited during floods), but it does not create the canyon itself.
So: canyon formation = mainly erosion aided by weathering, not deposition.
- Running water (rivers/streams) is the primary agent: it cuts downward (downcutting) and removes rock and sediment, carving deep canyons (e.g., the Grand Canyon by the Colorado River).
- Weathering (physical like freeze–thaw, and chemical) weakens rock and makes it easier for erosion to remove material.
- Tectonic uplift often helps by steepening gradients so rivers can incise faster.
- Deposition plays only a secondary role inside canyons (e.g., alluvial fans, river terraces, or silt deposited during floods), but it does not create the canyon itself.
So: canyon formation = mainly erosion aided by weathering, not deposition.
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