OBJECTIVE FORESTRY

FORESTRY

SOIL SCIENCE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
An igneous rock can turn into a sedimentary rock by:
A
weathering and erosion, then into sediments, then compacting
B
heat and pressure
C
Either A or B
D
None of the above
Explanation: 

Detailed explanation-1: -Igneous rocks can become sedimentary rocks by weathering, erosion, deposition, and compaction. Igneous rock at Earth’s surface breaks down into sediments by weathering. Erosion carries the sediments and deposits them in layers. Over time, these layers become buried and compacted to form sedimentary rock.

Detailed explanation-2: -Erosion and weathering include the effects of wind and rain, which slowly break down large rocks into smaller ones. Erosion and weathering transform boulders and even mountains into sediments, such as sand or mud. Dissolution is a form of weathering-chemical weathering.

Detailed explanation-3: -Usually, the rock pieces, called sediments, drop from the wind or water to make a layer. The layer can be buried under other layers of sediments. After a long time the sediments can be cemented together to make sedimentary rock. In this way, igneous rock can become sedimentary rock.

Detailed explanation-4: -On the surface, weathering and erosion break down the igneous rock into pebbles, sand, and mud, creating sediment, which accumulates in basins on the Earth’s surface. As successive layers of sediment settle on top of one another, the sediment near the bottom is compressed, hardens, and forms sedimentary rock.

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