cement rock[si′ment ‚räk]
An argillaceous limestone containing lime, silica, and alumina in variable proportions and usually some magnesia; used in the manufacture of natural hydraulic cement.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
cement rock, cement stone
A clayey limestone whose percentage composition of alumina, lime, and silica is about that of cement; may be used without the addition of other earth materials.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.