Slate is a metamorphic rock. Metamorphic rocks are formed when sedimentary or igneous rocks are exposed to conditions of very high pressure or temperature, or are exposed to large amounts of very hot water.Slate is formed when fine-grained sedimentary rock (shale) is buried and exposed to high pressure deep beneath the Earth's surface.gneous rocks are formed from melted rock that has cooled and solidified. When rocks are buried deep within the Earth, they melt because of the high pressure and temperature; the molten rock (called magma) can then flow upward or even be erupted from a volcano onto the Earth's surface.
As a patient with COPD, your health care provider may determine your oxygen levels at rest, while sleeping, or during exercise to see if oxygen may help you. If your oxygen levels are low, oxygen therapy will help reduce the strain on your heart, brain, and muscles, and using oxygen as directed may help you feel better.
How long will I need long-term oxygen therapy for? It is common to experience low oxygen levels following a flare-up of your condition. In over half of patients, oxygen levels will return to normal within a few months and the oxygen therapy can then be stopped.ome people may have low oxygen levels in their blood, for example because of a lung problem. Blood tests taken at the hospital have shown that the level of oxygen in your blood is low. Having low oxygen for long periods of time can place the heart and other major organs under stress.