The diagram shows how stone forms during the natural cycle. Overall, it is a cyclical process, which has 8 stages and involves physical, biological, and chemical steps.
To begin with, the volcanic eruption occurs 3 times per year and starts with magma falling on the surface and cooling, forming two layers: granite is on the top and basalt is below. After that, chemical and mechanical circumstances make rocks break down into smaller pieces in the first 7 months. Once the stage of weathering and erosion is over, sadiments of rocks are transferred with weather, namely rain and a water flow. Next, rocks passes through lithification, where their sediments deposit in river turns.
Subsequently, accumulated cement undergoes 3 phases before metamorphic rocks start forming. At the next stage, metamorphic rocks melt in the high temperatures of 32000C and pass the subduction process under the pressure of 2400 atm. Finally, when metamorphic rocks transform into magma, it is driven with internal heat and tectonic movements, so the volcanic eruption repeats.