The local rock is made up of sedimentary layers.

They discovered another, much longer cycle in the sedimentary layers.

However, it is now known that not all sedimentary layers are deposited purely horizontally.

Some traces of the most recent sedimentary layers remain for the discerning eye to discover, however.

Underlying sedimentary layers remain but lack the same profile.

When you cut into it, you can see the sedimentary layers.

The thick sedimentary layers can be divided into three distinct formations.

The igneous rock at the core of the mountain is wrapped in sedimentary layers.

Sixty million years ago, a gigantic explosion from within the earth blasted through the area's sedimentary layers to the surface.

This impact is due to the oil percolating into the sedimentary layer under the body of water.