1 Inflammation of the gingiva, bone loss, and increased gingival recession may progress slower than with other forms of periodontitis.  Periodontitis Associated with Systemic Diseases - Systemic diseases, such as heart disease, diabetes, and certain forms of arthritis, may have a correlation with periodontitis.
Main Content. An earthquake is ground shaking caused by a sudden movement of rock in the earthâs crust. Such movements occur along faults, which are thin zones of crushed rock separating blocks of crust.
Earthquakes occur as the edges of the continental plates slide over and under each other. Volcanoes are formed along high tension fault areas where the pressure of the plates pushing together cause the rock to melt from the pressure which finds its way to the surface in an effort to relieve the pressure.ell convergent boundarie(a plae where plates that move towards one another) one moves beneath the other one, thus forming mountains and volcanoes.... and transfrom boundaries(where two plates grind or slide against eah other) can be a fault line causing earthquakes.