Geology Reference
In-Depth Information
Fig. 12.13
Core log from the western end of Shackleford Banks, NC. Note the coarse lag deposit defi ning the base of the channel
and the overall fi ning upward inlet sequence (From Moslow and Tye
1985
)
migration of individual swash bars and large bar com-
plexes (amalgamated swash bars), and wave shoaling
across the swash platform.
1. The delta adjacent to the barriers is dominated by
marginal-fl ood channel deposits (4-5 m thick) con-
sisting of a basal shell-rich coarse sand fi ning
upward into landward-oriented, interbedded, planar
to cross-bedded fi ne to medium sand. These active
channel deposits grade upward into a bioturbated,
muddy sand with fl aser bedding, representing low
energy channel fi ll. This sequence is topped by
North Edisto Inlet is a large inlet, approximately
1.0 km wide, with a well-developed ebb-tidal delta that
extends 7 km offshore. Imperato et al. (1988) divided
the ebb delta facies of North Edisto into three regions
(Fig.
12.15
):
