dolomitic sediments - определение. Что такое dolomitic sediments
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Что (кто) такое dolomitic sediments - определение

CARBONATE MINERAL - CAMG(CO₃)₂
Pearl spar; Calcium magnesium carbonate; Dolomitic; Dolomitic lime
  • Cristallo]] in the [[Dolomites]] mountain range near [[Cortina d'Ampezzo]], Italy. The Dolomite Mountains were named after the mineral.
  • microscope]], but [[thin section]]s 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.

Cyclic sediments         
  • High Atlas middle liassic carbonate platform of Morocco and succession of regressive, autocyclic, "shallowing upward" metric sequences.
  • Model of a virtual "shallowing upward" metric sequence observed on carbonate platforms all along the south tethyan margin (about 10.000km) during the Liassic. (Micro)fossils are identical from the Maghreb till Oman and furtheron.
  • "shallowing upward" sequences from two sections distant of 230 km; note the hurricane (tempestites and tsunami ?)levels with abundant displaced foraminifera on supratidal flat. Middle Liassic, Morocco.
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SEQUENCES OF SEDIMENTARY ROCKS THAT ARE CHARACTERISED BY REPETITIVE PATTERNS OF DIFFERENT ROCK TYPES (STRATA) OR FACIES WITHIN THE SEQUENCE
Cyclic sedimentation; Cyclic sediment; Rhythmic sediment; Rhythmic sediments; Depositional cycle
Cyclic sediments (also called rhythmic sediments) are sequences of sedimentary rocks that are characterised by repetitive patterns of different rock types (strata) or facies within the sequence. Processes that generate sedimentary cyclicity can be either autocyclic or allocyclic, and can result in piles of sedimentary cycles hundreds or even thousands of metres thick.
Dolomite (rock)         
  • Triassic dolomitic rocks from [[Slovakia]]
  • Erosion of dolomite over weaker shale created the [[Niagara Escarpment]]
  • Erosion of dolomitic rocks in [[Mourèze]], Hérault, France
  • Cutting dolomite in 1994. [[Saaremaa]], [[Estonia]].
  • [[Trilobite]] fossil preserved as an internal cast in [[Silurian]] dolomite from southwestern Ohio, USA
SEDIMENTARY CARBONATE ROCK
Dolomite rock; Magnesium limestone; Microdolomite; Microdolomites; Dolomitic limestone; Dolomite (rocks); Dolomitic rock; Dolostone; Metadolomite
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(CO3)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 million years in age).
dolostone         
  • Triassic dolomitic rocks from [[Slovakia]]
  • Erosion of dolomite over weaker shale created the [[Niagara Escarpment]]
  • Erosion of dolomitic rocks in [[Mourèze]], Hérault, France
  • Cutting dolomite in 1994. [[Saaremaa]], [[Estonia]].
  • [[Trilobite]] fossil preserved as an internal cast in [[Silurian]] dolomite from southwestern Ohio, USA
SEDIMENTARY CARBONATE ROCK
Dolomite rock; Magnesium limestone; Microdolomite; Microdolomites; Dolomitic limestone; Dolomite (rocks); Dolomitic rock; Dolostone; Metadolomite
['d?l?st??n]
¦ noun Geology rock consisting of dolomite.

Википедия

Dolomite (mineral)

Dolomite () is an anhydrous carbonate mineral composed of calcium magnesium carbonate, ideally CaMg(CO3)2. The term is also used for a sedimentary carbonate rock composed mostly of the mineral dolomite. An alternative name sometimes used for the dolomitic rock type is dolostone.