Figure 4. Morphology of microtidal, mesotidal, and macrotidal coastlines 



(modified from Hayes (1976)) 6 



Figure 5. Littoral Environmental Observation forms used by the 



volunteer observers participating in the LEO program 13 



Figure 6. Late Quaternary sea level curves inferred from radiocarbon 



dated samples along the U.S. coastlines 14 



Figure 7. Monthly water level changes at Juneau, AK 16 



Figure 8. Monthly water level changes at Galveston, TX 16 



Figure 9. Yearly mean sea level changes at Juneau, AK, from 1936-1986 17 



Figure 10. Yearly mean sea level changes at Galveston, TX, from 1908- 



1986 17 



Figure 11. Typical tide curve for Oregon coast 19 



Figure 12. The reference zero point for IGLD 1985 at Rimouski, Quebec 

 is shown in its vertical and horizontal relationship to the Great 

 Lakes-St. Lawrence River System 21 



Figure 13. SPOT satellite image, Atchafalaya Bay, LA 24 



Figure 14. Northeast Gulf of Mexico, February 1990. NOAA 10 satellite, 



AVHRR Channel 4 25 



Figure 15. Spectral resolution and approximate spatial resolution of sensors 



on LANDSAT, SPOT, and NOAA satellites 26 



Figure 16. Bottom-mounted Sea Data™ 635-12 directional wave gage 



mounted in tripod using railroad wheels as corner weights . . 34 



Figure 17. Tidal elevations from seven stations in Choctawhatchee Bay 



and vicinity, Florida 37 



Figure 18. Trench excavated in the edge of a sand dune, eastern Alabama 



near Alabama/Florida state line 44 



Figure 19. Front view of lightweight vibracorer mounted 



on a barge 46 



Figure 20. Rotary drilling operations under way in the estuary of the 



Guayacan River, Ecuador 48 



