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Line 20: + + + + + + − [[file:classification-of-exploration-traps_fig2-3.png|left|thumb|{{figure number|1}}. Copyright: RMAG.]]+ − − − [[file:classification-of-exploration-traps_fig2-4.png|thumb|{{figure number|2}}See text for explanation.]]+ − − − − [[file:classification-of-exploration-traps_fig2-5.png|thumb|{{figure number|3}}Modified. Copyright: Vincelette and Foster, 1992; courtesy RMAG.]] − − [[file:classification-of-exploration-traps_fig2-6.png|thumb|{{figure number|4}}See text for explanation.]]
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==Classifying combination traps informally==
==Classifying combination traps informally==
<gallery>
file:classification-of-exploration-traps_fig2-3.png|l{{figure number|1}}Upper Valley field, Utah. Copyright: RMAG.
file:classification-of-exploration-traps_fig2-4.png|{{figure number|2}}Formal classification for Upper Valley field.
file:classification-of-exploration-traps_fig2-5.png|{{figure number|3}}Buck Peak field. Modified. Copyright: Vincelette and Foster, 1992; courtesy RMAG.
file:classification-of-exploration-traps_fig2-6.png|{{figure number|4}}Formal classification for the Buck Peak field.
</gallery>
To classify a combination trap informally, list the primary trap element first, followed by secondary and tertiary trap elements. You can classify a combination trap informally in at least two different formats. For example, Upper Valley field, Utah, shown in the map and cross section in [[:file:classification-of-exploration-traps_fig2-3.png|Figure 1]], could be classified informally as (1) a hydrodynamically modified anticlinal trap or as (2) a hydrodynamic/anticlinal trap.
To classify a combination trap informally, list the primary trap element first, followed by secondary and tertiary trap elements. You can classify a combination trap informally in at least two different formats. For example, Upper Valley field, Utah, shown in the map and cross section in [[:file:classification-of-exploration-traps_fig2-3.png|figure 1]], could be classified informally as (1) a hydrodynamically modified anticlinal trap or as (2) a hydrodynamic/anticlinal trap.
==Classifying combination traps formally==
==Classifying combination traps formally==
We classify a trap formally by listing the regimes, classes, and families for the primary, secondary, and (if necessary) tertiary systems. For example, the diagram in [[:file:classification-of-exploration-traps_fig2-4.png|Figure 2]] shows the formal classification for Upper Valley field.
We classify a trap formally by listing the regimes, classes, and families for the primary, secondary, and (if necessary) tertiary systems. For example, the diagram in [[:file:classification-of-exploration-traps_fig2-4.png|figure 2]] shows the formal classification for Upper Valley field.
==Combination structural traps==
==Combination structural traps==
Some structural traps are combinations of the three structural trap regimes: fold, fault, Structural traps and fracture. The Buck Peak field shown in [[:file:classification-of-exploration-traps_fig2-5.png|Figure 3]] is an example of a combination structural trap.
Some structural traps are combinations of the three structural trap regimes: fold, fault, Structural traps and fracture. The Buck Peak field shown in [[:file:classification-of-exploration-traps_fig2-5.png|Figure 3]] is an example of a combination structural trap.
==Buck peak formal classification==
==Buck peak formal classification==
The diagram in [[:file:classification-of-exploration-traps_fig2-6.png|Figure 4]] shows the formal classification for the Buck Peak field, which is a combination structural trap.
The diagram in [[:file:classification-of-exploration-traps_fig2-6.png|Figure 4]] shows the formal classification for the Buck Peak field, which is a combination structural trap.