16 Questions
Evaporites form when dissolved salts precipitate out of sea water due to concentration during distillation.
False
Sea water typically contains 35 grams per liter of dissolved ions.
True
The least soluble compounds precipitate last during the formation of evaporites.
False
Temperature has no effect on the amount of ions precipitated during the formation of evaporites.
False
Calcium sulphate can precipitate as gypsum or anhydrite during the evaporite formation process.
True
Gypsum and anhydrite are the most commonly encountered evaporite minerals in sedimentary rocks.
True
Evaporites are formed from the precipitation of minerals dissolved in water
True
The evaporites in the Michigan Basin are thicker than those in the Messinian of the Mediterranean basin
False
Gypsum and anhydrite are examples of irreversible reactions in evaporite formation
False
Evaporites are commonly found in marine basin settings due to the high evaporation rates
True
The Upper Silurian evaporites of the Michigan Basin are older than the Messinian evaporites of the Mediterranean basin
False
Evaporites are commonly found only in marine environments.
False
Gypsen and anhydrite are examples of evaporite minerals.
True
Evaporite minerals like gypsen can act as cap rocks to carbonate reservoir rocks.
True
Salt diapirism is a process involving the formation of gypsen.
False
Reversible reactions can convert anhydrite into gypsum under certain conditions.
True
Learn about two notable examples of thick evaporites found in geological basins: the >2-km-thick evaporites of the Messinian (Miocene) in the Mediterranean basin and the >600-m-thick Upper Silurian evaporites in the Michigan Basin.
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