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Figure 58. Aerial photo (1991) shows sinuous intra-island tidal channels in areas around Lower Matecumbe Key (middle Keys; from Lidz et al., 2003; compare with Fig. 57 and interpreted Benthic Ecosystems for Tile 3). White dotted line marks seaward edge of a nearshore rock ledge. Note width of the ledge relative to that of Lower Matecumbe Key. Also note tidal-delta sediments within channels and at channel edges. The four tidal channels in this photo are believed to represent bedrock depressions through which a forked Pleistocene river exited Florida Bay when the shelf was exposed (Davies, 1980).

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Coastal & Marine Geology Program > Center for Coastal & Watershed Studies > Professional Paper 1751