Description
Defiance Rock is located approx. 0.5 mi long, 0.1 mi wide, elevation approx. -68 ft. to -25 ft.; in Lake Michigan, NE of Garden Island Shoal, 5 mi. SW of Fagan Reef
History
Named for the ITB (integrated tug-barge) Defiance/Ashtabula, a voyage on which the feature was first noted.