- Geology, Petrology. of the nature of or resembling clay; clayey.
- containing a considerable amount of clayey matter.
Origin of argillaceous
Examples from the Web for argillaceous
Historical Examples of argillaceous
It must also not be full of argillaceous and iron-oxide infillings.
Argillaceous rocks, composed essentially of particles of mud.
From clay and chalk, or argillaceous river-mud and chalk or limestone, calcined together, and then ground to powder.
Argillaceous or marly limestone is also of common occurrence.
It alternates with both these rocks, and in like manner with argillaceous schist.