EARTH 119 Chapter Notes - Chapter 21: Desert Varnish, Alluvial Fan, Desert Pavement
7 Dec 2016
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Earth 119- chapter 21: the geology of deserts. Vocabulary: lighter rock beneath of the channel accumulates on the surface of the rock mountains block rain clouds from reaching the area bring water in from elsewhere, and has very sparse vegetation cover. Desert: a region so arid that it contains no permanent streams, except for those that. Rain shadow: the inland side of a mountain range, which is arid because the. Desert varnish: a dark, rusty-brown coating of iron oxide and magnesium oxide that. Petroglyphs: drawings formed by chipping into the desert varnish of rocks to reveal the. Dry washes (arroyos): the channel of an ephemeral stream when empty of water. Suspended load: tiny solid grains carried along by a stream without settling to the floor. Dust storm: an event in which strong winds hit unvegetated land, strip off the topsoil, Saltation: the movement of a sediment in which grains bounce along their substrate,
