OPEN FILE REPORT NO. 80 TABLE 1 (CONTINUED) TERTIARY/QUATERNARY Unit Lithologies Pliocene Tt Tjb Tic Tmc Tci Tc TQuc TQd TQu TQsu Tamiami Formation Jackson Bluff Formation Intracoastal Formation Miccosukee Formation Citronelle Formation Cypresshead Formation Reworked Cypresshead Formation Dunes Undifferentiated sediments Shell-bearing sediments limestone, sand, clay clay, sand limestone, sand, clay sand, clay sand, clay sand, clay sand, clay sand sand, clay shells, sand, clay QUATERNARY Pleistocene Trail Ridge sands Miami Limestone Key Largo Limestone Anastasia Formation Undifferentiated Beach Ridge and Dune Alluvium Pleistocene/Holocene Holocene Qh Holocene sediments sand, heavy minerals limestone, sand limestone limestone, coquina, sand sand, clay, organic sand sand, clay, organic sand, clay, organic Qtr Qm Qk Qa Qu Qbd Qal