Bathymetry and selected perspective views of 6 reef and coastal areas in Northern Lake Michigan.

Hog Island Reef
 

Figure 6.1 - Shaded relief map of area southeast of Hog Island including Hog Island Reef (shoal at lower right). This mapped area is marked by strong northwest-southeast ridges and lineations about a meter high and a few meters wide. These lineations are more pronounced but have a similar orientation to those to the west in the Trout Island map (Fig.5.1). An indistinct northeast southwest lineation is also present, especially in the northeastern quadrant of the image(Fig, 6.3) draped over this morphology are patches of smoother relief (sand?) which forms north-south bedforms. Hog Island reef itself does not seem to have obvious relation to either morphologic feature. Underwater observations (Somers, 1968) report flat lying outcrops of Limestones at Hog Island Reef.