yellow dune

Yellow dunes are

sand dunes A dune is a landform composed of wind- or water-driven sand. It typically takes the form of a mound, ridge, or hill. An area with dunes is called a dune system or a dune complex. A large dune complex is called a dune field, while broad, fl ...

that develop after the first set of embryo dunes appear. With an average depth of about 5m, with a soil to sand ratio that is small on the soil side (hence yellow dunes). The percentage of exposed sand on these dunes is generally about 20%. The remaining 80% is covered with vegetation that cannot withstand the conditions on the

embryo dunes An embryo is an initial stage of development of a multicellular organism. In organisms that reproduce sexually, embryonic development is the part of the life cycle that begins just after fertilization of the female egg cell by the male sperm c ...

. The plants on these dunes can withstand the slightly

alkaline In chemistry, an alkali (; from ar, القلوي, al-qaly, lit=ashes of the saltwort) is a basic, ionic salt of an alkali metal or an alkaline earth metal. An alkali can also be defined as a base that dissolves in water. A solution of a s ...

sand an example of the plants would be marram grass ''spinifex.'' The

moisture content Water content or moisture content is the quantity of water contained in a material, such as soil (called soil moisture), rock, ceramics, crops, or wood. Water content is used in a wide range of scientific and technical areas, and is expressed as ...

of these dunes is relatively low so the plants still have very strong root structure and are capable of getting every drop of water that comes their way. As this dune develops, a new Embryo dune will form in front. {{DEFAULTSORT:Yellow Dune Deserts Dunes