(n.) Geology. A type of structural hydrocarbon trap whose closure is controlled by the presence of an anticline. See: Closure, Structural Trap, Structure, Trap
Schlumberger Ltd. (The World's Leading Supplier Of Technology, Integrated Project Management And Information Solutions to Customers Working in The Oil and Gas Industry Worldwide), Schlumberger Oilfield Glossary Cedex, France 2014. http://www.glossary.oilfield.slb.com/en/Terms/sym/ a.aspx, (Ergo - Brit) {766}