Traction: What to Expect. The specifics of the traction therapy a person receives depends on the source of pain in their neck and spine. In most cases of mechanical traction, 7 to 10 pounds of weight will be applied for a half-hour, often two or three times daily.
Sandstone (sometimes known as arenite) is a clastic sedimentary rock composed mainly of sand-sized minerals or rock grains. Most sandstone is composed of quartz and/or feldspar because these are the most common minerals in the Earth's crust.
Sandstone is a clastic sedimentary rock that forms from the cementing together of sand sized grains forming a solid rock. Quartz is the most abundant mineral that forms sandstone. Calcium carbonate, silica, or iron has been added to the water that is in contact with the sand grains.