The blood pressure decreases and complaints, such as fatigue and lassitude, make themselves felt. These symptoms may also occur after the meal because the blood gathers in the area of the digestive organs and is missing in the brain. Dizziness.
Metamorphic rocks have been modified by heat, pressure and chemical processes, usually while buried deep below Earth's surface. Exposure to these extreme conditions has altered the mineralogy, texture and chemical composition of the rocks. There are two basic types of metamorphic rocks. Foliated metamorphic rocks such as gneiss, phyllite, schist, and slate have a layered or banded appearance that is produced by exposure to heat and directed pressure.
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.