Question

Large circular down warped structures are called?

1) Basins
2) Valleys
3) Domes
4) Folds

Answer 1

Large circular down warped structures are called basins (option 1), which form when the Earth's crust downwarps and are often filled with sedimentary rocks, making them important for natural resources.

Step-by-step explanation:

Large circular down warped structures are called basins. In geology, a basin is a depression or dip in the Earth’s surface. Basins are typically filled with sedimentary rocks and can be important for resource accumulation, such as petroleum or other minerals. They form when part of the Earth's crust downwarps due to forces such as the weight of mountain ranges. This is in contrast to folds, like anticlines and synclines, which occur as a result of the compression and bending of the Earth's crust.

For instance, during the phase when a seafloor undergoes rapid dropping due to the weight of mountains, it can create a concave basin. This is a geological process often associated with the phase 1 of mountain building and contributes to the creation of sediment-filled basins. In geographic regions like the Basin and Range Province, the structure of the landscape is largely shaped by these depressions and the alternating raised areas (ranges).