The next morning, Aj had said, he'd be down with six tons of red shale and then the real work would begin.

The softer red shale below is eroded away by water, sand and gravel to form the plunge pool.

It is mostly red shale with beds of gypsum.

The original surface was red shale, which needed repeated rolling.

The riverbed of Fishing Creek contains red and brown shale in some places.

He picked up a piece of the red shale examined it closely in sudden interest.

Its only feature was a scattering of red shale; as a reaction I began to superimpose pictures.

The bedrock below this type of soil is red shale.

It is built of red and gray shale and sandstone.

The most frequently used variety is red shale.