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There was was a volcano that was set to explode and for which people had been waiting for years. Any moment the volcano may have erupted. There is a lot of pressure and heat inside the volcano, and it has been building up for years.
OH NO! The volcano will erupt in an explosion. The lava that recently cooled down and the pressure that built up inside the volcano caused it to erupt! Igneous rock has resulted from this.
After the volcano erupted with lava, it cooled down once more, breaking up the materials to create sediments. The newly formed igneous rock must then crystallize. We now move on to sedimentary rock following this volcanic eruption that created igneous rock.
It's nice that the homes close to the volcano were unaffected. There are several exposed igneous rocks on the ground. It has been pouring rain and has been windy. This illustrates the weathering process and how it is causing the rock to crumble.
Near the houses, the boulders at the surrounding river begin to accumulate at the river's bottom. This is how a deposition is conducted. The sediment granules are pushed together by the water pressure. This is the process of compaction.
The minerals develop between the sediment grains as the water begins to evaporate. The minerals function as glue, binding the sediments together. This is how cement is made. The result is the formation of a sedimentary rock.

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