in contrast to primary porosity, is the porosity that develops in the rock or sediment after its deposition, by means of such processes a dissolution or fracturing.

Porosity developed in a rock subsequent to its emplacement or deposition. Processes are mostly dissolution of grains, cements, and other constituents due to changes in pressure and (or) pore-fluid composition.

New pore space in rocks, created some time after a rock first forms.