LIST OF FIGURES 

 Figure Page 



1. The location of Casco Bay 2 



2. Key to maps of upper and lower Casco Bay 3 



3. Some of the major existing facilities representing 

 threats to environmental quality in Casco Bay 4 



4. Locations of the 56 benthic stations sampled in 



Casco Bay, April 1980 7 



5 . Station depths in feet 13 



6. The annual temperature and salinity cycle at 



Boothbay Harbor (Garfield and Welch, 1978) 16 



7. The distribution of mean grain size in phi units 

 throughout Casco Bay 20 



8. Regression of mean grain size in phi units against 



depth in feet 22 



9. The distribution of sand, silt and clay in the 



Casco Bay samples 24 



10. The distribution of organic carbon in the surficial 

 sediments of Casco Bay 26 



11. The relationship between organic carbon and 



bottom depth 29 



12. The relationship between organic carbon and mean 



grain size (phi units) 30 



13. The distribution of cadmium (ppm dry weight) in 



the surficial sediments of Casco Bay, Maine 33 



14. The distribution of chromium (ppm dry weight) in 



the surficial sediments of Casco Bay, Maine 36 



VII 



