11. ________________________ metamorphism occurs in the Earth's upper crust when rocks immediately surrounding a molten igneous body are baked. 12. _________________________ metamorphism is a widespread type of metamorphism typically associated with mountain building, where segments of Earth's crust are deformed by the collision of crustal blocks 11. metamorphism occurs in the Earth's upper crust when rocks immediately surrounding a molten igneous body are "baked". 12. metamorphism is a widespread type of metamorphism typically associated with mountain building, where segments of Earth's crust are deformed by the collision of crustal blocks..