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Desert pavement evolution. Desert pavement surfaces are often coated with desert varnish, a dark brown, sometimes shiny coating that contains clay minerals. In the US a famous example can be found on Newspaper Rock in southeastern Utah. Desert varnish is a thin coating (patina) of clays, iron, and manganese on the surface of sun-baked boulders.
Desert pavement from the Mojave Desert. Desert varnish: A coating that can be found on the surface of desert rocks that can only be explained by the presence of clay particles which have been transported by wind. The discoloration of the clays can most often be attributed to black manganese oxides and red iron oxides.
Fairy circles are circular patches of land barren of plants, varying between 2 and 12 metres (7 and 39 ft) in diameter, often encircled by a ring of stimulated growth of grass. They occur in the arid grasslands of the Namib desert in western parts of Southern Africa, and in a part of the Pilbara in Western Australia. Studies have posited ...
A 3.5-million-acre swath of Mojave Desert, between Ridgecrest and the Morongo Basin, has been named a sentinel landscape, a federally led effort to promote sustainable land-use near military ...
Dune fields in the Australian desert. Sand dunes of the Empty Quarter to the east of Liwa Oasis, United Arab Emirates. A dune is a landform composed of wind- or water-driven sand.
The most famous desert intaglios are the Nazca Lines in Peru. [3] The Blythe Geoglyphs or intaglios (anthropomorphic geoglyphs) were created by scraping away layers of darker rocks or pebbles to reveal a stratum of lighter-valued soil. The displaced rocks outlined the figures and the exposed soil was stamped down which makes it more difficult ...
Caliche fossil forest on San Miguel Island, California. Caliche (/ k ə ˈ l iː tʃ iː /) (unrelated to the street-slang "Caliche" spoken in El Salvador) is a soil accumulation of soluble calcium carbonate at depth, where it precipitates and binds other materials—such as gravel, sand, clay, and silt.
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