On fourth down, as the half ended, Matt Stover, standing on the slippery clay, sent a 30-yard field goal attempt into the Dolphins' defensive line.

Winter rains aggravated the severe drainage problem in the region and the entire base became a quagmire of slippery clay.

The rain has been heavy, and this is not the sticky black mud that I am used to, but slippery yellow clay.

The multiple kicks from the pistol were enough to completely unsettle his balance, and his feet were unable to counter the slippery red clay.

He tried to rise from his knees, but his shoes would not grip on the slippery clay.

A slippery, gray, limestone-based clay called "marl" is the shoreline and near-shore soil.

The slippery clay undermined her movement and provoked her into indecision she could ill afford.

Then the stones of the north road gave way to damp and sometimes slippery clay, and he wished he had a staff for balance as his steps slowed.

Soon we were pushing the bikes up a steep track of stones and slippery clay.

He sputtered and coughed as he clawed at the slippery clay.