Gumbo - A local term for clay soil that becomes sticky, impervious, and plastic when wet.

any relatively sticky formation (such as clay) encountered in drilling

any of various fine-grained silty soils that become waxy and very sticky mud when saturated with water

Material in the plastic state identified by a soapy or waxy appearance.

a local term for a highly plastic clay found mostly south of I-10; the gumbo south of I-10 is frequently referred to as “black gumbo” since it is usually black in color

Gumbo refers to a variety of fine-grained silty soils (usually clays) found in the western and southern portions of the United States. (see Clay)

a fine-grained soil that contains much clay and becomes sticky and plastic when wet. It is found in the southerm central and western parts of the United Staets. [AHDOS