For the past decade, volumetric seismic attributes have been used to help define depositional systems (Nissen et al., 1999, Posamentier, 2003). Seismic attributes provide the geometry of paleo-environments, particularly in settings where there is a sharp contrast in the geometry of adjacent systems, for instance in channel belts and associated systems. Most published studies have been applied to very large, high quality marine surveys that provide good temporal and spatial resolution of the features of interest. In this study, we apply the same methodology to a large mega-merge land survey of moderate quality acquired over east Texas. This survey is large enough to illuminate significant parts of the depositional system but suffers from the lower frequency content and signal to noise ratio of land surveys, further exacerbated by the merging of at least seven separate (heterogeneous) data acquisition programs taking place over the data. In this study we apply stratal and horizon slice interpretation techniques to several volumetric attributes to describe the depositional systems within a depositional time interval that is strongly influenced by salt tectonics.