In low accommodation and shallow-shelf settings,spatial variations in accommodation commonly result in the formation of remnants ranging in size from small(few to tens of square kilometers) to basin scale(hundreds of square kilometers).Remnants of porous and permeable facies encased in low-permeability facies are an important and relatively common type of stratigraphic trap.In foreland basins,remnants may be more common in distal than proximal settings;in ramp-margin settings,depositional remnants appear to be closely associated with lowstand to transgressive systems tract deposits.To identify depositional remnants,the first step is the identification of regionally extensive erosion surfaces;then,the key to remnant identification lies in the detailed correlation of both overlying and underlying time-stratigraphic units.Depositional remnants are used to illustrate their significance to petroleum exploration and production;recognition and integration of the depositional remnant concept into stratigraphic studies may lead to new exploration plays in mature hydrocarbon producing basins.