Changes

==Lithologies==

==Lithologies==

Brittle, fine-grained rocks—cherts, clay-free limestones and dolomites, and well-sorted siltstones—almost never seal. Intermediate lithologies such as calcareous or siliceous shales, argillaceous siltstones, and argillaceous or anhydritic limestones can seal where the rocks have not been excessively strained, such as in stratigraphic traps or broad, gentle folds. Even relatively intact, thick seals may be fractured at the high strain rates and total strains in some disturbed belts.

Brittle, fine-grained rocks—cherts, clay-free limestones and dolomites, and well-sorted siltstones—almost never seal. Intermediate lithologies such as calcareous or siliceous shales, argillaceous siltstones, and argillaceous or anhydritic limestones can seal where the rocks have not been excessively [[Wikipedia:Deformation_(mechanics)#Strain|strained]], such as in stratigraphic traps or broad, gentle folds. Even relatively intact, thick seals may be fractured at the high strain rates and total strains in some disturbed belts.

==Predicting leakage==

==Predicting leakage==