reef trap

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reef trap Stratigraphic oil or gas trap produced by porous reef limestones (reservoir rock) covered by impermeable strata. Porosity of limestones depends on post-depositional diagenetic changes. A reef trap may also host lead and zinc mineralization in material deposited from migrating brines. Compare ANTICLINAL TRAP; FAULT TRAP; STRATIGRAPHIC TRAP; STRUCTURAL TRAP; and UNCONFORMITY TRAP.

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reef trap A stratigraphic oil or gas trap produced by porous reef limestones (the reservoir rock) covered by impermeable strata.