Consisting largely of a dense clay, the soil in the region turned out to be poorly suited to farming.

The soil in the district is light sandy or dense clay of yellowish brown colour.

The growing region has dense clay and loam soils.

The most long-lived substance, plutonium, is present only in trace amounts, he said, and the terrain's dense clay slows the spread of radioactive isotopes.

A slab of dense clay fell away, baring a foot of the plug.

Much of the soil found on the slopes of Roxy Ann is dense, sticky clay; this composition often causes problems during building construction.

The subsoil only a few inches beneath the surface was a dense yellow clay.

The soil was thin over a base of dense clay.

They had found no end to it so far and they had tunneled through more than half an acre of the dense, dark clay.

The understratum was yellowish clay, dense and difficult to dig even when it was sodden.