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.
This happens when rocks are subjected to the most intense heat and pressure they can stand without melting. A common example of the result of this phenomenon is gneiss. Slate, schist and gneiss are all foliated metamorphic rocks. Non-foliated metamorphic rocks do not have a platy or sheet-like structure.There are several ways that non-foliated rocks can be produced. Some rocks, such as limestone are made of minerals that are not flat or elongate.wo easy metamorphic classifications are: foliated and non-foliated. Foliation describes the texture (how the rock looks) of metamorphic rocks. It has to do with the way minerals are aligned in a rock.