The earlier works were mainly dedicated to the evolution of the basement rocks of the area.

Only the crater's basement rocks remain on the surface in the mountains today.

"Well, there's a wide, long strip of basement rock in the northern continent, along the western mountain range."

Telgar's notion about moving to that cave system on basement rock in the north is gaining strength.

The lab that he came to had been cut from the solid basement rock of Wolf Island.

This formation is not exposed in the park, though it does form its basement rock.

All basement rocks are covered by more recent sediments.

"Are we all to go look at some basement rock now, Telgar?"

The falls are 120 feet (36 meters) in height and tumble over basement rock of granite.

They are metamorphosed basement rocks from prior to the Miocene.