CONTENTS-Cont inued 



Page 



4. Human Influence 51 



5. Longshore Bars 52 



VIII VOLUME, WIDTH, AND SLOPE DATA 52 



1. Estimated Volumes of Erosion 52 



2. Beach Width 54 



3. Sediment-Slope Relationships 54 



IX SUMMARY 54 



LITERATURE CITED 59 



APPENDIX - Plotted profiles, August 1970 - July 1972, 



for Sites 1 through 17, Eastern Lake Michigan 63 



TABLES 



1 Warren Dunes State Park (Lake Michigan) ; Littoral 



Observation Program (1972) 14 



2 Muskegon State Park (Lake Michigan) ; Littoral 



Observation Program (1972) 15 



3 Ludington State Park (Lake Michigan) ; Littoral 



Observation Program (1972) 16 



4 Amount of bluff or terrace erosion (feet) at each 



profile site for each 4-week period 24 



5 Sediment characteristics 47 



6 Composition and volume of material eroded from 



terrace and bluff 53 



FIGURES 



1 Index map showing profile locations 10 



2 Number of 24-hour periods in which winds equaled or 



exceeded 20 miles per hour at Muskegon 12 



3 Mean annual elevations at Harbor Beach, Michigan 17 



4 Monthly mean elevation at Harbor Beach, Michigan 18 



