Figure 60. Enlarged insets A-C (from Fig. 59) show numbered 1989 sample sites (red dots of Lidz and Hallock, 2000), relative to the keys (dashed lines), tidal passes, and the shelf margin (blue depth contour, in meters). Note the parallelogram representing the Looe Key National Marine Sanctuary at the margin in (C). Sediment grains illustrated in thin section (Fig. 12) came from the Looe Key National Marine Sanctuary.