[Dr. Bogus Pachysandra]

Thack,
What is the connection, geologically, between salt layers/domes and oil deposits?

[thackney]

As I understand it, the formation of a salt dome often results in formations leading to petroleum traps.

[thackney]

This site gives a short explanation with links to more info, depending how much info you want.

http://www.priweb.org/ed/pgws/systems/traps/structural/structural.html#salt