An old term rather loosely used to designate various dark-colored, heavy igneous rocks, including especially the feldspathic-augitic rocks, basalt, dolerite, amygdaloid, etc., but including also some kinds of diorite. Called also trap rock.

Of or pertaining to trap rock; as, a trap dike.

A common name for dark, fine grained igneous rock, especially basalt and diabase.

A natural configuration of layers of rock where non-porous or impermeable rocks acts as a barrier, blocking the natural upward flow of hydrocarbons.

In petroleum geology, a trap is a place in the subsurface to which oil or natural gas migrates, and from which it cannot migrate any further. A trap requires an impermeable seal above the porous reservoir rock that contains the oil or gas. A trap may be an anticline, a change in rock type along one particular unit of rock, a fault-bounded zone, and other structures.

A sedimentary or tectonic structure where oil and/or natural gas has accumulated. These are structural highs where a porous rock unit is capped by an impermeable rock unit. Oil and gas trapped within the porous rock unit migrate to a high point in the structure because of their low density.

sedimentary or tectonic structure that impedes the upward movement of oil and gas and allows it to collect beneath the barrier.

a geologic structure or a stratigraphic feature capable of retaining hydrocarbons

a high area in the reservoir rock

a non-permeable geological formation which holds the hydrocarbons and prevents them from escaping

a reservoir that is overlain by a dense cap rock or a zone of very low or no porosity that restrains migrating hydrocarbon

Geological structure in which hydrocarbons build up to from an oil or gas field.

The occurrence of those structures, pinch-outs, permeability changes, and similar features necessary for the entrapment of oil and (or) gas in at least one accumulation of the minimum size. Included in this attribute are existence of seals sufficient for entrapping hydrocarbons and capable of holding oil and gas accumulations during appropriate ranges of geologic time

A body of reservoir rock, vertically or laterally-sealed, the attitude of which allows it to retain hydrocarbons which have migrated into it.

The mechanism by which oil and gas are prevented from migrating out of the reservoir.

Any geological structure which precludes the migration of oil and gas through subsurface rocks, causing the hydrocarbons to accumulate into pools.

a formation in the earth’s sub-surface which prevents the onward migration of hydrocarbons.

Any feature or characteristic of a formation which will allow the accumulation, but not the escape, of oil or gas.

a former term for basalt or other fine-grained, dark, igneous rock usually having a sheetlike or teplike structure. [AHDOS

Trap is the second studio album of the Belgian rock band Dead Man Ray. It was released in 2000.