Changes

===Evaporite mineralization===

===Evaporite mineralization===

The most common evaporite mineral found with carbonate rocks is anhydrite and its hydrous form, gypsum. Gypsum is the common form at shallow depths, but it converts to anhydrite at depth in response to higher temperatures. Bedded anhydrite is commonly found in tidal flat environments and is an effective reservoir seal. Diagenetic anhydrite is found in reservoir rocks as nodules and poikilotopic crystals, which have little effect on reservoir properties, and as pore-filling crystals, which reduce reservoir quality.

The most common evaporite mineral found with carbonate rocks is [[anhydrite]] and its hydrous form, [[gypsum]]. Gypsum is the common form at shallow depths, but it converts to anhydrite at depth in response to higher temperatures. Bedded anhydrite is commonly found in tidal flat environments and is an effective reservoir seal. Diagenetic anhydrite is found in reservoir rocks as nodules and [[poikilotopic crystals]], which have little effect on reservoir properties, and as pore-filling crystals, which reduce [[reservoir quality]].

===Dissolution and associated processes===

===Dissolution and associated processes===