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.
Non-foliated metamorphic rocks such as hornfels, marble, quartzite, and novaculite do not have a layered or banded appearance. Pictures and brief descriptions of some common types of metamorphic rocks are shown on this page. Hornfels is a fine-grained nonfoliated metamorphic rock with no specific composition.
Slate is a metamorphic rock. Metamorphic rocks are rocks that change form from one type of rock into another because of time, pressure, heat and other factors. Other metamorphic rocks include slate, shale, schist, gneiss and marble. The new form of a rock is determined by the composition of the original rock. Shale doesn't automatically turn into slate.