How does fossil fuel affect limestone?

Answer 1

The question is a little difficult to answer because the way it is worded. Fossil fuels are hydrocarbons (oil and gas), and coal. Hydrocarbons result after organic materials are confined underground for very long periods of time under the right conditions of pressure and temperature. Generally, hydrocarbons are found in sandstones and carbonates. The carbonates may be complex mixtures, but are generally reservoir carbonate rocks are classified as consisting primarily of dolomites or limestones. There are changes in the limestone structure as a result of the decomposition of organic material, but these changes are more the result of water which may contain other salts and other minerals that water contains. Water is responsible for the transport of clays or silts into the pore structure. The pores of the limestone may become larger due to the dissolving of calcium by the water or the substitution of calcium for magnesium, which is called dolomitization. Clays can form in the pore spaces and restrict flow. .

Answer 2

Fossil fuel emissions, which release sulfur dioxide and nitrogen oxides, can contribute to acid rain when they mix with water in the atmosphere. Acid rain can directly affect limestone by breaking down its calcium carbonate component through a chemical reaction, leading to erosion and degradation of limestone structures.