Question

The steps in the formation of sedimentary rocks are listed below in an incorrect order.

1. Rocks are weathered.
2. The sediments are compacted together.
3. They are deposited in layers.
4. Small pieces of rocks are carried by water.

Which of these best shows the correct order of steps in the formation of sedimentary rocks?

Select one:
a. 4, 1, 2, 3
b. 4, 3, 1, 2
c. 1, 4, 3, 2
d. 1, 3, 4, 2

Answer 1

Answer;

c. 1, 4, 3, 2

Explanation;

• Sedimentary rocks are among the three major types of rocks, others being igneous rocks and metamorphic rocks. Sedimentary rocks result from the deposition and cementation of minerals or organic particles on the ocean floor or other water bodies on the surface of the earth.
• Sedimentary rocks are formed through the following steps;

1) weathering of preexisting rocks,

2) transport of the weathering products,

3) deposition of the material, then

4) compaction, and

5) cementation of the sediment to form a rock.

Answer 2

The first step in the formation of sedimentary rock is weathering of preexisting rocks. The second step is transport of the weathering products. The third step is deposition of the material. And at the end there is compaction and cementation of the sediment to form a rock.
According to this, the following shows the correct order of steps in the formation of sedimentary rocks:
C. 1, 4, 3, 2
Rocks are weathered.Small pieces of rocks are carried by water.They are deposited in layers.The sediments are compacted together.