rocky substratum

That day before Toffner went home he had paid a visit to his secret chamber deep in the rocky substrata.

They are mostly demersal reef-dwellers, where one species seems to prefer rocky substrata.

Coralline algae are widespread in all of the world's oceans, where they often cover close to 100% of rocky substrata.

Macrocystis species typically grow forming extensive beds, large "floating canopies", on rocky substrata between the low intertidal.

The first shockwave that was caused by the detonation of the explosives was transmitted through the rocky substratum with a velocity of 8.5 miles per second.

The river has cut through weaker rocky substrata of the Hampi landscape and created a narrow gorge where granite hills confine the river in a deep ravine.

Over the Hercynian bedrock there is a prevalence of sandy beaches, and in other areas, the erosion of these sands has allowed the exposure of the rocky substrata.

Diving into the new crater, Dr. Malahoff found vents spewing a mixture of superheated water, dissolved minerals and microbes that thrive in the seabed's rocky substratum.

Of the rocky substratum of the province it became more evident than ever that not a trace remained, and a new soil of unknown formation had certainly taken the place of the old sandy sea-bottom.