noun[mass noun] Geology
- A series of beds of clay, sandstone, limestone, and ironstone, forming the top of the Wealden strata in southern England and containing abundant fossil remains.More example sentences
- They carried out pumping trials to demonstrate that vacuum-assisted drainage using an array of ejector wells would be effective in controlling pore pressures in the Weald clay.
- As the uplift cycles waned an extensive mud plain developed that is preserved as the Weald Clay.
- The Weald Clay we now find there represents the muddy bottom of this lake.