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The cavity was regularly pressurized by geotectonic forces and vibrations from nearby faults, which also created seismic waves.

Geotectonic, jē-o-tek-ton′ik, adj. relating to the structure of the earth.

No more striking illustration of this feature can be found than that supplied by the Alps, nor one where the geotectonic structures have been so fully studied in detail.

Part V.—Geotectonic or Structural Geology From a study of the nature and composition of minerals and rocks, and an investigation of the different agencies by which they are formed and modified, the geologist proceeds to inquire how these materials have been put together so as to build up the visible part of the earth’s crust.

From geotectonic geology it understands the various processes whereby these materials were put together so as to build up the complicated crust of the earth.