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Rounded and sorted sediment is typically found in environments where there is consistent water flow, such as river channels, beaches, or areas affected by wave action like deltas or alluvial fans. The round shape of the sediment is usually due to abrasion from repeated transport, while the sorting occurs as the water moves smaller particles further and faster than larger ones.
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What part of a cave are stromatolites found in?
Stromatolites are typically found in shallow marine environments within a cave, such as near the cave entrance where light can penetrate for photosynthesis to occur. These microbial mats form layers of sediment and minerals over time, creating structures that can be observed in cave environments.
Can you find quartz in a river rock?
Yes, quartz can be found in river rocks. Quartz is a common mineral that is often found in sedimentary, metamorphic, and igneous rocks, including those found in riverbeds. It can appear as a clear, white, or colored crystalline mineral within the rock.
Where are drumlins and eskers usually found?
Drumlins are usually found in regions that were covered by glaciers during the last Ice Age, such as parts of North America and Europe. Eskers are commonly found in areas that were once covered by glaciers, including parts of Scandinavia, North America, and Siberia.
What is an aluveal fan?
An alluvial fan is a cone-shaped deposit of sediment that forms where a stream flows from a steep gradient to a flatter area, causing the sediment to spread out in a fan-like shape. These features are typically found at the base of mountains or hills in arid or semi-arid regions. Alluvial fans are formed by the deposition of sediment carried by the stream as its velocity decreases upon reaching the flatter terrain.
What is the most common igneous rock of the ocean basins?
Ocean basins are primarily made of the igneous rock, basalt.
