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Answer for the clue "(geology) the leaping movement of sand or soil particles as they are transported in a fluid medium over an uneven surface ", 9 letters:
saltation

Alternative clues for the word saltation

Word definitions for saltation in dictionaries

Wikipedia Word definitions in Wikipedia
In biology , saltation (from Latin , saltus , "leap") is a sudden change from one generation to the next, that is large, or very large, in comparison with the usual variation of an organism. The term is used for nongradual changes (especially single-step ...

Douglas Harper's Etymology Dictionary Word definitions in Douglas Harper's Etymology Dictionary
"a leap, a bound," 1620s, from Latin saltationem (nominative saltatio ) "a dancing; dance," noun of action from past participle stem of saltare "to hop, dance," frequentative of salire "to leap" (see salient (adj.)).

Wiktionary Word definitions in Wiktionary
n. 1 A leap, jump or dance. 2 beating or palpitation. 3 (context biology English) A sudden change from one generation to the next; a mutation. 4 Any abrupt transition. 5 (context geology fluid mechanics English) The transport of loose particles by a fluid ...

WordNet Word definitions in WordNet
n. (geology) the leaping movement of sand or soil particles as they are transported in a fluid medium over an uneven surface a mutation that drastically changes the phenotype of an organism or species an abrupt transition; "a successful leap from college ...

Usage examples of saltation.

Looking round him again, taking in the view of nebulas and star-clouds as his almost weightless saltation carried him toward his ship, Harry had to admit to himself that Hyperborea might be, after all, a reasonable place to establish a weather station.

Earth, the winds necessary to initiate the saltation of sand grains are ten times that for Earth, and the particle-size distribution may be different on the two planets.

Since the theory of punctuated equilibria frequently is confused with true saltation, it is important here to discuss saltation, and show why it cannot be a significant factor in evolution.

But it was a digression, because the theory of punctuated equilibria is the main topic of this chapter, and that theory in truth has no connection with macromutation and true saltation.