Box vents are not mechanical vents and work better when used with soffit ventilation. They're designed to work with open attics and do not need to be placed close to roof ridges to work optimally. They are also known as low profile vents because they are static and installed over a hole cut into the roof.
Stone Mountain is made of igneous granite which is composed of quartz, feldspar, microcline and muscovite, with smaller amounts of biotite and tourmaline. Embedded in the gran â¦ ite are xenoliths or pieces of foreign rocks entrained in the magma. 13 people found this useful. T.E. Woodwose.
Also, rocks and beach pebbles too, are composed of minerals. So one could group stones according to what mineral they are made of. Jasper and agate stones belong to the quartz family. But not all stones are composed of only one or two minerals. In that case, a rock or pebble stone will belong to more than one mineral groups.