The lower basin is made up of young sediments, including laterite and recent alluvium.

Disconformities show erosional features such as valleys, hills and cliffs that are later covered by younger sediments.

Ehux is only seen in relatively young sediments, and must have evolved fairly recently.

The crater is buried beneath younger sediments and cannot be seen at the surface.

Later such fossils turn out to be freed from the original seam and refossilized in a younger sediment.

The crater is buried beneath younger sediments and is not exposed at the surface.

The dolomite was later deeply buried by younger sediment.

Angular unconformity: younger sediment lies upon an eroded surface of tilted or folded older rocks.

Nonconformity: relatively young sediments are deposited right above older igneous or metamorphic rocks.

Over 5000 feet (1500 m) of younger sediments were deposited and have been mostly eroded away.