Figure 8. (a) To the south, a cross section of the carbonate platform onshore of Puerto Rico based on interpretation of outcrops from Monroe [1980], to the north, offshore EW 96-05 line 4, in the area of the carbonate platform. (b) Interpretation of EW 96-05 line 4. An average velocity of 2750 m/s was used for the carbonate platform. The platform limestones are very consistent in thickness and 4û northward dip. Inset shows location of EW 96-05 line 4.