FIGURES 

 Figure Page 



1 Distribution of gas and oil fields and pipelines on 



the Texas-Louisiana continental shelf 2 



2 Bathymetric and physiographic province map of Gulf 



of Mexico 6 



3 Generalized regional currents of the Gulf of Mexico 8 



4 Generalized directions of flow of surface waters in 



the northern Gulf of Mexico by month 9 



5 Generalized patterns of flow of surface waters in the 

 western part of the northern gulf on a monthly basis — 12 



6 Monthly mean river discharge from the Atchafalaya 



and Mississippi Rivers and the sum of the mean outflows 



of the rivers west of the Atchafalaya to the Rio 



Grande 13 



Surface isohalines for the northwestern gulf 14 



8 Surface isohalines showing extensions of low and high 

 salinities over the northwestern Gulf of Mexico shelf 

 during spring and summer 15 



9 Characteristic environmental structure of the water 

 column observed in the Buccaneer Gas and Oil Field 



during spring, 1979 16 



10 Seasonal trends in average temperatures of inshore 



and offshore surface waters with coastal air 19 



11 Surface isotherms for winter and summer 20 



12 Annual variation of temperature with depth in the 

 northwestern Gulf of Mexico 22 



13 Areas with dead bottoms as evidenced by trawl catches 

 and hydrographic data taken at platforms during 



Cruise II, August/September 1978 - 24 



14 Distribution of sediment types in the northern Gulf 



of Mexico 26 



15 Distribution of submarine banks in the northern Gulf 



of Mexico 27 



16 Faunal assemblages of the Gulf of Mexico 30 



17 Faunal assemblages of the Gulf of Mexico 31 



18 Faunal assemblages of the Gulf of Mexico 32 



19 Faunal assemblages of the Texas-Louisiana continental 

 shelf 34 



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