. Atoll research bulletin. Coral reefs and islands; Marine biology; Marine sciences. ? kilometers (ft) M IAO. to 184 meters Fig. 8. ate Pleistocene colluvium Section through Boiler Bay and off-lying barrier reefs. Boiler Bay basement depths based on probes and cores (see text) , fore- reef sediment depths estimates. Symbols as Fig. Boiler Bay ^patch" barrier reef inner barrier outer barrier reef A. palmata Montastrea Diploria Fig. 9. Section through reef at East Point (Fig. 4). Basement depth estimated from previous sections. From -2 to -13 m, the reef is dominated by Acropora palmata
. Atoll research bulletin. Coral reefs and islands; Marine biology; Marine sciences. ? kilometers (ft) M IAO. to 184 meters Fig. 8. ate Pleistocene colluvium Section through Boiler Bay and off-lying barrier reefs. Boiler Bay basement depths based on probes and cores (see text) , fore- reef sediment depths estimates. Symbols as Fig. Boiler Bay ^patch" barrier reef inner barrier outer barrier reef A. palmata Montastrea Diploria Fig. 9. Section through reef at East Point (Fig. 4). Basement depth estimated from previous sections. From -2 to -13 m, the reef is dominated by Acropora palmata on undercut blocks of A. palmata pavement separated by rubble-filled grooves and basins. A narrow rubble-sand band with gor- gonians occurs at -13 m. The rather narrow deep fore-reef is charac- terized by Acropora cervicornis, Montastrea annularis and Diploria 140- _40 I20_ IOCL -30 eo_ 6o_ _20 40_ _io 20_ SI. 20_ _IO 40_ (SO. _20 eo_ lOQ- _30 to bj meters East Point labrynthiformis alternating with a pavement occasionally having gor- gonians and basket sponges. This zone degenerates to a rubble slope and then to a narrow sand channel at 23 m. The easterly limit of the Meandrina hard ground is not known. n Cl p O D 03' -n o « -a 3 % o 0 heandnna hardground shelf edge 9 naut miles from Last Point. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Smithsonian Institution. Press; National Research Council (U. S. ). Pacific Science Board; Smithsonian Institution; National Museum of Natural History (U. S. ); United States. Bureau of Sport Fisheries and Wildlife. Washington, D. C. : [Smithsonian Press]
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