Dolomite is the title of each the carbonate rock and a mineral (formula: CaMg(CO₃)_Two) consisting of the calcium magnesium carbonate found in crystals. Dolomite rock (as well dolostone) is composed predominantly of the mineral dolomite. Limestone which is partially replaced by dolomite is known as dolomitic limestone, or even around old U. S. geological literature when magnesian limestone.

Dolomite mineral crystallizes in the trigonal - rhombohedral system. It forms white, gray to pink, normally curved, crystals although these are normally massive. It has physical properties similar to people of the mineral calcite, but is less soluble within diluted hydrochloric acid. A Mohs hardness is 3.Five to Four & a specific gravity is 2.85.

Dolomite wwhen number 1 described inside 1791 as a rock per French naturalist and geologist, Deodat Guy Tancredelaware de Gratet de Dolomieu (1750-1801) for exposures in the Dolomite Alps of northern Italy.

The dolomite problem
There exists a bit of uncertainty when to the stimulator of dolomite formation, when brobdingnagian deposits come present around the geologic record, however these are comparatively uncommon in modern environments. This is known as a "Dolomite Problem". Dolomite accounts for just about 10% of tons sedimentary rock, including much that would keep around been produced touching a surface of the Globe. Nevertheless, laboratory synthesis of unchallenged dolomite has been carried out exclusively at temperatures of greater than Centred degrees Celsius, conditions average of burial inside sedimentary basins. Consistent laboratory syntheses of dolomite (& magnesite) leads first to the initial precipitation of the metastable "precursor" (like mg calcite), to exist as changed bit by bit into other & additional of the stable phase (like dolomite or even magnesite) in the period of periodic intervals of dissolution & reprecipitation. A general principle governing a course of this irreversible geochemical reaction has been coined "Ostwald's Step Rule".

Recent locate has discovered modern dolomite formation under anaerobic conditions in supersaturated saline lagoons along the Rio de Janeiro coast of Brazil, namely, Lagoa Vermelha & Brejo wash Espinho. Similar processes use been found in the Coorong vicinity of South Australia. 1 interesting reported outbreak was the formation of dolomite in the kidneys of a dalmatian dog. This was believed to exist as due to chemical change triggered by bacterium.

Dolomite is nowadays thought to respond sustaining under these conditions with a serve of sulfate-reducing bacteria. This joins more the food and drug administration inside pointing out numbers of newly interesting links between big-shell geology and small-shell microbiology (see geomicrobiology). A actual role of bacterium in the online-temperature formation of dolomite remains to exist as demonstrated. Despite considerable confusion a super mechanism invoked for instance by sulfate-reducing bacterium has non however been demonstrated.

Uses
Dolomite is utilized as an cosmetic stone & as a raw lesson for the manufacture of cement. These are likewise the source of magnesium oxide. These are besides an significant petroleum reservoir rock and the unsuspecting hosts rock for big strata-attached base metal (lead, zinc, copper) deposits.