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Are deltas created by erosion or deposition?
Deltas are created by deposition. They form when sediment carried by a river is deposited as the river slows down and meets standing water, such as an ocean or lake. Erosion plays a role in shaping the delta, but the primary process involved in delta formation is deposition.
What do sediment deposits on dry land form?
Sediment deposits on dry land can form various landforms such as sand dunes, alluvial plains, and deltas. Over time, these deposits can accumulate and be cemented together to form sedimentary rocks.
What countries have deltas?
Some countries with deltas include Bangladesh (Ganges-Brahmaputra Delta), Egypt (Nile Delta), Vietnam (Mekong Delta), and Nigeria (Niger Delta). Deltas form where rivers meet the sea, depositing sediment to create fertile land and unique ecosystems.
What does deposition mean in science?
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Can sedimentary rock form directly from metamorphic rock?
Yes, sedimentary rock can form from metamorphic rock through a process called retrograde metamorphism. In this process, metamorphic rocks are broken down by weathering and erosion to form sediment, which can then be compacted and cemented to form new sedimentary rock.
