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.
Metamorphic Rocks. Introduction. The process of metamorphism is one that changes or alters either the mineralogy or the texture, but typically both, of some pre-existing rock. Metamorphic rocks are consequently rocks that have undergone a change or metamorphosis from a previous state as a sedimentary, igneous or even another metamorphic rock.