The majority of Illinois surface bedrock belongs to the Pennsylvanian period, particularly the downstate region.

Vault Conditions Reinforced concrete vault on surface bedrock exposure and completely hilled over with overburden.

The surface bedrock under the Miami area is called Miami oolite or Miami limestone.

Cutter-suction dredgers are most often used in geological areas consisting of hard surface materials (for example gravel deposits or surface bedrock) where a standard suction dredger would be ineffective.

Ninety-degree fractures along the stretch gave it the look of painted road lines and the fact that the gypsum was not flush with the surface bedrock is what gave it the three dimensionality of tiling.

The lack of surface bedrock outcropping greatly reduces the chances of hazardous ricochets during live-fire exercises and also assists in the safe retrieval and secure disposal of both detonated and un-detonated ordnance.

As in the rest of Denmark, excluding the remote island of Bornholm, there is no surface bedrock in the seas around here, as Djursland's landscapes were formed by complex and non-uniform glacial movements with related meltwater flows, in the span of the last three ice ages.