Lichen sclerosus and lichen planus are fairly common, non cancerous skin conditions. They can affect different parts of the body, but commonly affect the vulva. When they affect the skin of the vulva, theyâre known as vulval LS or LP.
A gap-graded soil is a soil that has an excess or deficiency of certain particle sizes or a soil that has at least one particle size missing. An example of a gap-graded soil is one in which sand of the No. 10 and No. 40 sizes are missing, and all the other sizes are present.
This type of sand dune requires a large amount of sand and strong winds. The fourth and largest type of sand dune is the longitudinal dune. Longitudinal dunes are large symmetrical ridges of sand that form parallel to the primary wind direction. These dunes are straight and regularly spaced, with barren ground in between each dune.