This planet's version of plain old clay mud.

But from all apparent signs, simply clay mud as reported.

Actually, it had been just more of that damned reddish clay mud, seeping through the ceiling and falling on him.

It was covered in red clay mud as if he'd been driving through ditches.

The days of rain had turned the whole yard into a slick and sticky clay mud.

At summer's end the pond was drained and harvested by hand because the clay mud would not hold up heavy machinery.

The half-sunken cliffs immediately to the west are loaded with fossils, but the clay mud is sticky and messy.

Depending on the region and the available materials the stage may also be coated with clay mud.

This clay mud conataining attapulgite was likely to have been brought to the city from the nearby swamps.

Someone adapted a tractor so it would not sink into the clay mud that underlay the salt ponds.