Aleurite is an unconsolidated sediment with a texture intermediately between sand and clay, similar to silt, with particle sizes ranging from 0.01 to 0.1 millimetres (0.00039 to 0.00394 in).
[1] The name aleurite is derived from the Greek word aleuron, meaning "flour".
[2] The term aleurite is mainly used in Russian geology, where it is described from the Baltic and Kara Seas,[3][4] and as a derivative in Mongolia, such as the Dushihin Formation, where it occurs in lenses.
[5] Aleurite primarily comprises mineral grains (quartz, feldspar, mica, and others).
The term aleurite has been proposed by Soviet petrographer A. N. Zavaritskiy in 1930.