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 below, 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.