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They are formed by calcium carbonate being deposited on some tiny seed substance from a saturated solution. To form the ooids the water must gently move or roll the grains so the calcium carbonate coating forms a concentric shell

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What is oolitic stone?

Oolite is sometimes also known as 'Egg Stone'. It is a limestone formed from ooids, spherical grains found in concentric layers.


What are oolites composed from?

Oolites are sedimentary rocks formed from ooids, spherical grains composed of concentric layers. Another name for oolite is egg stone. The name is of Hellenic origin.


What are cave formation made around grains of sand?

Cave formations around grains of sand are known as ooids. Ooids form when calcium carbonate and other minerals accumulate around a grain of sand in a process known as ooidogenesis. Over time, layers of minerals build up around the core grain, creating rounded structures found in caves and sedimentary rocks.


Oolitic limestone is most likely to form in what type of depositional environment?

Oolitic limestone is most likely to form in high-energy marine environments, such as shallow tropical seas with strong currents where the rapid agitation of water helps form small ooids (rounded sediment grains). These ooids accumulate and cement together to form oolitic limestone.


What does oolitic mean?

Oolitic refers to a sedimentary rock composed of small spherical grains called ooids, which are typically made of calcium carbonate. Oolitic rocks are formed in marine environments where currents cause the grains to accumulate and grow layer by layer.


What is the difference between fossiliferous limestone and oolitic limestone?

Fossiliferous limestone has larger fossils in the rock and is of biochemical composition where as the oolitic limestone doesn't have any fossils and has a chemical composition. The Oolitic limestone has spherical grains that resemble miniature pearls (they are called ooliths or ooids). Both do effervesce in diluted HCL(acid)


What are the types of limestone in the Caribbean?

The two main types of limestone found in the Caribbean are coral limestone, formed from the skeletal remains of marine organisms like coral, and oolitic limestone, composed of small round grains called ooids. These limestone types are common in the region due to the prevalence of coral reefs and marine environments that have existed there over millions of years.


What is the chemistry of limestone?

The limestone consists mainly of calcium carbonate: CaCO3 ,Calcite. Like most other sedimentary rocks, limestones are composed of grains, however, around 80-90% of limestone grains are skeletal fragments of marine organisms such as coral or foraminifera. Other carbonate grains comprising limestones are ooids, peloids, intraclasts, and extraclasts. Some limestones do not consist of grains at all and are formed completely by the chemical precipitation of calcite or aragonite. (i.e. travertine.)


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