Salt dome
（重定向自Salt domes）
![Astronaut photography of Jashak salt dome in the Zagros Mountains in Bushehr Province, Iran (the white area in the middle)](/Images/godic/202502/08/ZagrosMtns_SaltDome_ISS012-E-187745229.jpg")
![Salt dome in Fars Province, Iran](/Images/godic/202502/08/Salt_dome_Hadi_Karimi5229.jpg")
![Left shows a generalized structure of a salt dome. Right shows two fault regimes that make up the crestal graben, the dotted line indicates the top of the salt.](/Images/godic/202502/08/Salt_Dome5229.JPG")
![End-on view of emergent salt dome between remnants of displaced overburden](/Images/godic/202502/08/Ken_Leonard_-_Fisher_Towers_-_IMAG00595229.JPG")
A salt dome is a type of structural dome formed when a thick bed of evaporite minerals (mainly salt, or halite) found at depth intrudes vertically into surrounding rock strata, forming a diapir. It is important in petroleum geology because salt structures are impermeable and can lead to the formation of a stratigraphic trap.