Final answer:
Contact metamorphism occurs adjacent to igneous intrusions and involves changes in the surrounding rocks due to the heat from the magma. This process leads to the formation of new minerals and textures.
Step-by-step explanation:
Metamorphism adjacent to igneous intrusions is known as contact metamorphism. Contact metamorphism occurs when hot magma intrudes into cooler surrounding rocks, causing the temperature of the rocks to increase. The high temperatures from the magma cause the rocks to chemically and/or physically change, resulting in the formation of new minerals and textures. This type of metamorphism is localized and usually occurs on a smaller scale compared to regional metamorphism.