Question

Why are sedimentary rocks important?

Answer 1

Hint: Sedimentary rocks are created by the deposition or accumulation of mineral or organic particles at the Earth's surface, followed by cementation. The processes that cause these particles to settle in place are referred to as sedimentation.

Complete answer:
The continents of the Earth's crust have a sedimentary rock cover that covers 73 percent of the current land area, yet sedimentary rock accounts for only 8% of the crust's volume. Sedimentary rocks form a thin layer on top of a crust that is mostly made up of igneous and metamorphic rocks. Sedimentary rocks are deposited in strata, or layers, to produce a structure known as bedding. Sedimentary rocks are frequently deposited in sedimentary basins, which are enormous structures. On Mars, sedimentary rocks have also been discovered.
There are two important points to consider.
1. Stratigraphy
2. Investments in the economy
Stratigraphy is a geological specialty that aims to understand the spatial distribution and provenance of various rocks. Understanding Stratigraphy in a certain location is like being an automotive engineer for the globe. You find out why things are the way they are. Weathering, deposition, compaction, and lithification combine to form sedimentary rocks. Although they cannot be precisely dated, they provide insight into the earth's biological history and earlier geological events.

Economic deposits such as alluvial gold, manganese, and iron ore can be found in sedimentary rocks. They make the earth more stable for numerous purposes in building. The most essential function is that they create the conditions for magma intrusions to develop economic deposits like PGEs and sulphides.

Note:
Igneous rocks can only form in a few places. The majority of them are created where plates collide. A few appear where the crust separates. Almost all of them are evidence of crustal disruption. Because the majority of the mantle is solid, igneous rocks indicate that the crust or mantle experienced extraordinary heat.