Describe the steps of the rock cycle and relate them to weathering, erosion, plate tectonics, and mountain building.
Describe the steps of the rock cycle and relate them to weathering, erosion, plate tectonics, and mountain building
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The rock cycle is a continuous process that describes the transformation of rock types through various geological processes. Here are the steps involved:
1. Igneous Rock Formation: Magma from beneath the Earth’s crust cools and solidifies to form igneous rocks. This can happen below ground (intrusive) or on the surface after a volcanic eruption (extrusive).
2. Weathering: Once exposed, igneous rocks can be broken down into smaller particles through weathering. This process can be mechanical (physical breakdown) or chemical (altering the mineral composition).
3. Erosion and Transportation: The weathered material is then eroded by wind, water, or ice and transported to different locations, such as riverbeds or ocean floors.
4. Sedimentary Rock Formation: Over time, sediments are deposited and compacted, forming sedimentary rocks. This process can occur in bodies of water or in layers on land.
5. Metamorphism: Sedimentary rocks can be subjected to heat and pressure, typically from tectonic activity, leading to metamorphic rocks. This transformation alters the original structure and composition.
6. Subduction and Recycling: Continental and oceanic plates interact at plate boundaries. Subduction zones lead to rocks being pushed deep into the Earth, where they can melt and ultimately form magma again, continuing the cycle.
7. Mountain Building: Plate tectonics can cause the Earth’s crust to buckle and fold,