primary stratigraphic trap

A stratigraphic trap formed by the deposition of clastic materials (such as shoestring sands, lenses, sand patches, bars, or cocinas) or through chemical deposition (such as organic reefs or biostromes).

Related terms:

• stratigraphic trap
• secondary stratigraphic trap
• stratigraphic oil fields
• porosity trap
• time-stratigraphic facies
• fault trap
• petroleum trap
• permeability trap
• oil trap
• stratigraphic separation