Aleurolith

The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Aleurolith

 

consists mostly of grains of the size of 100 to 10 microns, cemented and condensed, after some diagenetic changes, into a hard split rock.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.