* Igneous rocks form from cooled magma or lava. They have a crystalline structure and are generally hard and dense.
* Sedimentary rocks form from the accumulation and cementation of sediments. These sediments can be derived from the weathering and erosion of pre-existing rocks, including igneous rocks.
High pressure can contribute to the following:
* Metamorphism: High pressure, along with heat, can transform igneous rocks into metamorphic rocks. This involves changes in mineral composition and texture, but the rock remains solid.
* Deep burial: Pressure can cause the compaction and cementation of sediments, contributing to the formation of sedimentary rocks.
However, high pressure alone doesn't break down the igneous rock into the individual particles needed to form sediments. Weathering and erosion, which are processes driven by factors like wind, water, and temperature fluctuations, are essential for creating those sediments.
To summarize:
* High pressure can change igneous rocks into metamorphic rocks, not sedimentary rocks.
* High pressure can contribute to the formation of sedimentary rocks by compacting sediments.
* Weathering and erosion are necessary to break down igneous rocks into sediments that can form sedimentary rocks.
