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Reference.org
Salt dome
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<p>A salt dome is a type of <a href="/facts/Dome_(geology)/EP5rbPLN">structural dome</a> formed when salt (or other <a href="/facts/Evaporite/vNW8fcEy">evaporite</a> minerals) intrudes into overlying rocks in a process known as <a href="/facts/Diapir/3IgntJKj">diapirism</a>. Salt domes can have unique surface and subsurface structures, and they can be discovered using techniques such as <a href="/facts/Seismic_reflection/SjYqC6kv">seismic reflection</a>. They are important in <a href="/facts/Petroleum_geology/jMPyPVmN">petroleum geology</a> as they can function as <a href="/facts/Petroleum_trap/g9rHIn8f">petroleum traps</a>. </p>