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Limestone is a carbonate rock formed from the secretion of a carbonate skeleton by marine animals. There are many different minerals that can be considered carbonates (anything with a CO3 in it), but the two most common minerals in limestone, the most common carbonate rock, are calcite (produced by forams, echinoderms and bivalves) and aragonite (produced by corals).

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How did CO2 get locked in carbonate rocks?

Carbon dioxide can get locked in carbonate rocks through processes such as weathering of rocks containing carbonates, which leads to the formation of bicarbonate ions that eventually get precipitated as carbonate minerals (e.g., calcite) in rocks. Over time, this process sequesters CO2 in the form of carbonate minerals in the rocks.


How does carbonate get into rocks?

Carbonate minerals can form in rocks through the deposition of calcium carbonate (CaCO3) from marine organisms like shells and coral. It can also be introduced through chemical processes, where carbon dioxide combines with minerals in the presence of water to form carbonates.


Do all sedimentary rocks bubble in acid?

No. Only sedimentary rocks containing carbonate minerals will bubble with acid.


Minerals that are what will bubble when treated with hydrochloric acid.?

Minerals that contain carbonate ions, such as calcite (a form of calcium carbonate), will bubble when treated with hydrochloric acid due to the release of carbon dioxide gas. This reaction is commonly used to test for the presence of carbonate minerals in rocks or minerals.


What are carbonate minerals?

Examples of carbonate minerals would be calcite, dolomite, and aragonite. These are widely distributed in the Earth's crust. Less common carbonate minerals include siderite, rhodochrosite, strontianite, smithsonite, witherite, and cerussite. Minerals that are considered to be carbonates contain the carbonate ion, CO32−


What is carbonate weathering?

Carbonate weathering is the process by which rocks containing carbonate minerals (such as calcite) are broken down and dissolved due to exposure to carbon dioxide and water. This process can alter the rocks' chemical composition and form new minerals. Carbonate weathering plays a significant role in the carbon cycle and can affect the acidity of soil and water.


What rocks are a natural source of calcium carbonate?

Limestone, chalk, and marble are examples of rocks that are natural sources of calcium carbonate. These rocks are formed from the accumulation of calcium carbonate minerals over time, which can be used for various purposes including in construction, agriculture, and industry.


Is granite a carbonate rock?

No, granite is not a carbonate rock. Granite is an igneous rock that is mainly composed of minerals such as quartz, feldspar, and mica. Carbonate rocks are sedimentary rocks made up of carbonate minerals like calcite and dolomite.


What rocks have carbonate in them?

Limestone and dolomite are common rocks that contain carbonate minerals. These rocks form primarily from the accumulation of calcite or aragonite for limestone, and dolomite for dolomite, often from the remains of marine organisms.


Calcium carbonate is a major component of which sedimentary rocks?

Calcium carbonate is a major component of sedimentary rocks such as limestone, chalk, and marble. These rocks form from the accumulation of marine organisms' shells, coral reefs, and precipitated calcite minerals.


How is carbon dioxide released into the air by carbonate rocks?

Carbonate rocks, like limestone, can release carbon dioxide when they break down or weather. This process, known as chemical weathering, occurs when carbonic acid in water reacts with the minerals in the rocks, leading to the release of carbon dioxide into the air.


What do carbon minerals contain?

Most carbonate minerals are either calcium carbonate (limestone) or a mixture of calcium carbonate with magnesium carbonate (dolomite). However other metals can also combine with carbonate to produce much rarer carbonate minerals.