Question

 Identify the rock with following properties:

1.Rocks precipitated chemically from solutions of one kind or another.

2.It is also formed organically and accumulation of materials derived from other rocks.

Select the correct answer from following codes

• A. Metamorphic rocks
• B. Sedimentary rocks
• C. Igneous rocks
• D. None of the above

Answer 1

Answer:

B. Sedimentary rocks

Sedimentary rocks

• Sedimentary rocks are one of the three general categories of rocks.

• They are rocks that are formed in layers by the process of deposition, subject to weathering and sorting.

• The main characteristic of sedimentary rocks is that they are found in layers.

• Soil, minerals, mineral salts, and other plant and animal remains are deposited in layers, and over time many other layers are deposited on top of these.

• Due to the weight of the layers above, the layers below slowly harden and become rock.

• "Rocks that are chemically precipitated from solutions of one kind or another" refers to chemical sedimentary rocks,

• For example, limestone and halite (salt rock).

• "If it is formed organically and by the accumulation of material derived from other rocks, it refers to organic sedimentary rocks (e.g. coal) or clastic sedimentary rocks (e.g. sandstone, shale)