A Navigotion Tronsponder Sit 



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Figure 8. Trackline location map. Long Beach to Maumee Bay. 



Two shallow seismic reflection surveys of central Lake Erie have been pub- 

 lished by Morgan (1964) and by Wall (1968). However, Wall's structure contour 

 maps are too general to provide much information on sand deposits, and Morgan's 

 maps of three reflectors (bedrock, the sediment-water interface, and a reflector 

 intermediate between bedrock and the lake bottom) are also too general . 



A comprehensive study of the known sand and gravel deposits within the Ohio 

 part of Lake Erie was done by Hartley (1960) between 1953 and 1957 . In addition 

 to detailed echo sounding and bottom sampling, 100 holes were jetted in and near 

 the three Central Basin sand deposits (Cedar Point, Lorain-Vermilion, Fairport 

 Harbor), and 48 holes were jetted in the Western Basin deposit (Maumee Bay). 

 Subsequent sampling and echo sounding were done off Ashtabula, Conneaut, Huron, 

 and Sandusky, and in the island area (Herdendorf and Braidech, 1972). The work 

 by Hartley provided important data that were extensively used in the planning 

 stages of this study. 



Several hundred kilometers of seismic reflection profiles and 32 borings and 

 cores were collected in a rectangular nearshore area off Cleveland as part of an 

 engineering feasibility study for a proposed airport facility on a manmade island 

 (Dames and Moore, 1974). 



