Salt domes are geological formations created when salt deposits, often found deep underground, rise through layers of rock due to pressure. This process can occur over millions of years, causing the salt to push upwards, forming a dome shape. These structures can be found in various locations around the world, often associated with oil and gas reserves. The salt within these domes is typically halite, a mineral composed of sodium chloride. Salt domes are significant in the energy industry because they can trap hydrocarbons, making them important sites for oil and natural gas extraction. Additionally, they can influence local geology and ecosystems.