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.
Metamorphic rocks are formed when heat and pressure below Earth's surface change a rock. Metamorphic rocks can be either foliated or nonfoliated. Foliated rocks are metamorphic rocks that have their grains arranged in parallel layers or bands. Slate is an example of a foliated rock.rganic rocks form when the remains of plant or animals are deposited in thick layers and become cemented together. Coal and limestone are both examples of organic rocks. Chemical rocks are formed when minerals that are dissolved in solution crystallize. Rock salt is an example of a chemical rock.