saltation
121Dipodidae — Temporal range: Oligocene–Recent …
122Bed load — The term Bed load describes particles in a flowing fluid (usually a river) that are transported along the bed. This is in opposition to suspended load and wash load which are carried entirely in suspension.Bedload moves by a variety of methods,… …
123Yardang — A yardang is a wind abraded ridge found in a desert environment. Yardangs are elongate features typically three or more times longer than they are wide, and when viewed from above, resemble the hull of a boat. Facing the wind is a steep, blunt… …
124Hopeful Monster — is the colloquial term used in evolutionary biology to describe an event of instantaneous speciation, saltation, or systemic mutation, which contributes positively to the production of new major evolutionary groups. The memorable phrase was… …
125Desert pavement — near Barstow, California, in the Mojave Desert. A desert pavement is a desert surface that is covered with closely packed, interlocking angular or rounded rock fragments of pebble and cobble size …
126Galtür Avalanche — On February 23 1999 the worst Alpine avalanche in 40 years. It killed 31 people in the small Alpine village of Galtür, Austria. Three major weather systems originating from the Atlantic accounted for large snow falls totalling around four metres… …
127Dreikanter — A Dreikanter is a type of ventifact that typically forms in desert or periglacial environments due to the abrasive action of blowing sand.[1] Dreikanters exhibit a characteristic three faced pyramidal shape. The word Dreikanter is a German word… …
128Erg (landform) — For other uses, see Erg (disambiguation). Issaouane Erg, Algeria. (31°11 …
