The Yegua Formation is a minor siliciclastic progradation off the Gulf of Mexico shelf margin.
Due to the limited sand supply and the flat coastal plains, the updip depositional complexes are almost entirely separated from the downdip shelf-edge deltas and slope fans.
The Yegua formation can truly be called a natural laboratory for the study of sequence stratigraphy.
A number of plays in the downdip and 'mid-dip' (incised valley complexes) trends have resulted in more than 4 TCF of gas and condensate, and new discoveries await the return of exploration capital.
The story of the formation of the structure at Yegua is also of great significance and interest to the students of siliciclastic stratigraphy in passive-margin settings.