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.
Metamorphic Rocks. Metamorphic rocks are formed due to metamorphism from existing igneous or sedimentary rocks, or even from existing metamorphic rocks. When existing rocks undergo changes due to high pressure and/or high temperature and/or high shearing stresses, metamorphic rocks are formed. Igneous rocks are the oldest rocks, while metamorphic are being derivative of igneous rocks and sedimentary rocks. - Igneous rocks are the major proportion (nearly 95%) of the total rocks, while metamorphic rocks are found in a very small percentage.