The subtidal-supratidal sequence is commonly [[Dolomitization|dolomitized]] and contains [[anhydrite]] and [[gypsum]]. In the subtidal interval, dolomitized grainstones retain their [[Intergranular porosity|intergranular pore space]], except where cemented by anhydrite, and form permeable units. Dolomitization of the subtidal mud-supported sediments converts the tight, mud-supported [[limestone]]s to permeable units because of the larger [[dolomite]] crystals and [[intercrystalline porosity|intercrystalline pore space]]. This produces two types of flow units in the subtidal interval: a [[dolomud]]-supported flow unit and a [[dolograin]]-supported flow unit. Each will have a unique [[porosity]]-[[permeability]] transform. | The subtidal-supratidal sequence is commonly [[Dolomitization|dolomitized]] and contains [[anhydrite]] and [[gypsum]]. In the subtidal interval, dolomitized grainstones retain their [[Intergranular porosity|intergranular pore space]], except where cemented by anhydrite, and form permeable units. Dolomitization of the subtidal mud-supported sediments converts the tight, mud-supported [[limestone]]s to permeable units because of the larger [[dolomite]] crystals and [[intercrystalline porosity|intercrystalline pore space]]. This produces two types of flow units in the subtidal interval: a [[dolomud]]-supported flow unit and a [[dolograin]]-supported flow unit. Each will have a unique [[porosity]]-[[permeability]] transform. |