Search results
Results from the WOW.Com Content Network
Dolomite and calcite look similar under a microscope, but thin sections can be etched and stained in order to identify the minerals. Photomicrograph of a thin section in cross and plane polarised light: the brighter mineral grains in the picture are dolomite, and the darker grains are calcite.
Dolomite (also known as dolomite rock, dolostone or dolomitic rock) is a sedimentary carbonate rock that contains a high percentage of the mineral dolomite, CaMg(CO 3) 2. It occurs widely, often in association with limestone and evaporites , though it is less abundant than limestone and rare in Cenozoic rock beds (beds less than about 66 ...
Limestone is the most common carbonate rock [3] and is a sedimentary rock made of calcium carbonate with two main polymorphs: calcite and aragonite.While the chemical composition of these two minerals is the same, their physical properties differ significantly due to their different crystalline form.
Language links are at the top of the page across from the title.
In the Grand Canyon and using the informal name, Cambrian undifferentiated dolomites, E. D. McKee and C. E. Resser [8] recognized three types of dolostone within the Frenchman Mountain Dolostone. They are a white to buff, granular, hard, massive dolomite; a white to yellow, aphanitic (porcelain-textured), thin-bedded dolomite; and a steel-gray ...
Main Dolomite (German: Hauptdolomit, Hungarian: Fődolomit, Italian: Dolomia Principale) is a lithostratigraphic unit in the Alps of Europe. Formation was defined by K.W. Gümbel in 1857. Middle to Late Triassic sedimentary record in the Alpine realm is characterized by presence of various masses of dolomitic rock formations.
The Beck Spring Dolomite is a geological formation in Death Valley, California from the Tonian period of the Neoproterozoic era. It is believed to be between 750 to 800 million year olds. It is known for its highly palaeontologically significant fossils of microbial life. [1] It consists almost entirely of dolomite. [2]
Ooids are most commonly composed of calcium carbonate (calcite or aragonite), but can be composed of phosphate, clays, chert, dolomite or iron minerals, including hematite. Dolomitic and chert ooids are most likely the result of the replacement of the original texture in limestone.