Inversion is turning the sole of the foot or ankle medially, and eversion is turning it laterally.
Metamorphic rock. Metamorphic rocks arise from the transformation of existing rock types, in a process called metamorphism, which means change in form. The original rock is subjected to heat and pressure, causing profound physical and/or chemical change.The protolith may be sedimentary rock, igneous rock or another older metamorphic rock.he original rock is subjected to heat and pressure, causing profound physical and/or chemical change. The protolith may be sedimentary rock, igneous rock or another older metamorphic rock.
1 Metamorphic rocks are the third type of rock. 2  Meta = change; morph = shape or form. 3  Metamorphic rock is produced when sedimentary, igneous and other metamorphic rocks are subjected to sufficient pressure and heat to change their crystal structure and size. Metamorphic rocks are the third type of rock. 2  Meta = change; morph = shape or form. 3  Metamorphic rock is produced when sedimentary, igneous and other metamorphic rocks are subjected to sufficient pressure and heat to change their crystal structure and size.