|
Salt is found many miles below the surface of the earth. The earth, itself, creates tremendous heat and pressure, forcing the salt to migrate upwards towards the surface of the earth, breaking up rock along the way (The Paleontological). If the salt sits next to the rock, it can chemically change the rock from permeable to impermeable. Oil flowing through the faults will come to rest when it encounters the salt dome. The oil is trapped, not only by the salt itself, but also by the now impermeable rock (Encyclopedia Britannica).
|
| http://www.priweb.org/ed/pgws/systems/traps/structural/structural.html#anticline |
|
