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OVERVIEW OF THE MARINE TERTIARY AND QUATERNARY DEPOSITS BETWEEN CAPE FEAR AND CAPE LOOKOUT, NCLookout (Fig. 9). Zullo and Harris (1979) recognized threescarps that formed the seaward borders of tilted plains in thearea: the Hanover Scarp, the Bogue-Suffolk Scarp, and theAlligator Bay Scarp. The Hanover Scarp originated at aninterpreted cape in central New Hanover County north of theCape Fear River. To the south, Zullo and Harris (1979) suggestedthat the scarp paralleled the north side of the CapeFear River for several kilometers eventually becoming theSurry Scarp 80 km inland of the coastal margin. AlthoughFlint (1940) recognized the Surry Scarp inland on theOnslow Block, Zullo and Harris traced the Hanover Scarpnortheastward to just south of the New River where it turnedabruptly to the north eventually merging inland along theNeuse Hinge with the Surry Scarp. Soller and Mills {1991)followed the identification and location of the Surry Scarp asmapped by Flint {1940), and did not recognize the HanoverScarp. The plain delimited on the Onslow Block by theOrangeburg Scarp and the Hanover-Surry Scarp is identifiedas the Duplin Plain {Zullo and Harris, 1979). Sediments ofDuplin age represent the youngest marine formation underlyingthe area. Zullo and Harris {1979) indicated that DuplinPlain was at an elevation of more than 12 m in central NewHanover County and over a distance of 60 km graduallyincreased to about 21 m on the west side of the New River.The Bogue-Suffolk Scarp is located seaward of theHanover Scarp and essentially delimits the modern mainlandcoast on the Onslow Block. Mixon and Pilkey {1976)mapped the Bogue Scarp north of the New River, and indicatedthat in central Carteret County, it abruptly turned northand became part of elements associated with the SuffolkScarp. The plain delimited by the Hanover Scarp and theBogue-Suffolk Scarp is called the Waccamaw/CanepatchPlain {Zullo and Harris, 1979) and ranges in elevation fromabout 7.5 m in central New Hanover County to over 10.5 mjust north of the New River. Waccamaw and James City Formationsediments represent the youngest marine sedimentsunderlying the plain. Zullo and Harris {1979) also proposedthe Alligator Bay Scarp for a linear feature that occurred seawardof the Bogue Scarp between Spicer and Alligator Bays,Onslow County. The plain bounded by Bogue Scarp and theAlligator Bay Scarp rose from sea level 12 km south of NewRiver to about 4.5 mat New River and was designated theSocastee Plain. North of New River Inlet, the Alligator BayScarp may merge with the Bogue Scarp, forming the westernlimit of the Core Creek Sand.ACKNOWLEDGMENTSI thank the University of North Carolina at Wilmington,and the Center for Marine Science Research for providingpartial support for this work. Appreciation is also expressedto William J. Cleary for the invitation to submit a paper forthe guidebook, and James A. Dockal for his careful review ofthe paper. This is CMSR contribution #143.REFERENCESBaum, G.R., Harris, W. B., and Zullo, V.A., 1978, Stratigraphicrevision of exposed middle Eocene to lower Miocene formationsof North Carolina: Southeastern Geology, v. 20, p. 1-19.Blackwelder, B. W., 1981, Stratigraphy of the upper Pliocene andlower Pleistocene marine and estuarine deposits of northeasternNorth Carolina and Virginia: U.S. Geological Survey Bulletin1502-B, 16 p.Campbell, L. D., 1993, Pliocene mollusks from the Yorktown andChowan River Formations in Virginia: Virginia Division ofMineral Resources, Publication 127, 259 p.DuBar, J.R., 1971, Neogene stratigraphy of the lower Coastal Plainof the Carolinas: Atlantic Coastal Plain Association, 12thAnnual Field Conference, Myrtle Beach, SC, 128 p.DuBar, J.R., and Solliday, J.R., 1963, Stratigraphy of the Neogenedeposits, lower Neuse Estuary, North Carolina: SoutheasternGeology, v. 4, p. 213-233.DuBar, J.R., Johnson, H.S., Thorn, B., and Hatchell, W.O., 1974,Neogene stratigraphy and morphology, south flank of the CapeFear Arch, North and South Carolina; in R.Q. Oaks and J.R.DuBar, eds., Post-Miocene stratigraphy, central and southernAtlantic Coastal Plain: Utah State University Press, Logan,Utah, p. 139-173.Ferenczi, I., 1959, Structural control of the North Carolina CoastalPlain: Southeastern Geology, v. 1, p. 105-116.Flint, R.F., 1940, Pleistocene features of the Atlantic Coastal Plain:American Journal of Science, v. 238, p. 757-787.Gibson, T.C., 1983, Stratigraphy of Miocene through lower Pleistocenestrata of the United States Central Atlantic CoastalPlain; in C.E. Ray, ed., Geology and Paleontology of the LeeCreek Mine, North Carolina: Smithsonian Contribution to Paleobiology53, p. 35-80.Haq, B.U., Hardenbol, J., and Vail, P.R., 1987, Chronology of fluctuatingsea levels since the Triassic: Science, v. 235, p. 1156-1167.Harris, W.B. and Zullo, V.A., 1991, Eocene and Oligocene geologyof the outer Coastal Plain; in J.W. Horton and V.A. Zullo, eds.,The Geology of the Carolinas: University of Tennessee Press,Knoxville, Tennessee, p. 251-262.Harris, W.B. and Laws, R.A., 1994, Paleogene sediments on theaxis of the Cape Fear Arch, Long Bay, North Carolina: SoutheasternGeology, v. 34, p. 185-199.Harris, W.B. and Laws, R.A., in press, Paleogene Stratigraphy andsea-level history of the North Carolina Coastal Plain: Globalcoastal onlap and tectonics: Sedimentary Geology and Evolutionof the Atlantic Coastal Plain -Sedimentology, Stratigraphyand Hydrogeology, Special Volume, Elsevier.Harris, W.B., Zullo, V.A. and Baum, G.R., 1979, Tectonic effects onCretaceous, Paleogene, and early Neogene sedimentation,North Carolina; in G.R. Baum, W.B. Harris and V.A. Zullo,eds., Structural and Stratigraphic Framework for the CoastalPlain of North Carolina: Carolina Geological Society and theAtlantic Coastal Plain Association, Field Trip Guidebook,Wrightsville Beach., North Carolina, p. 17-29.Harris, W.B., Zullo, V.A., and Laws, R.A., 1993, Sequence stratigraphyof the onshore Palaeogene, southeastern Atlantic CoastalPlain, USA; in H.W. Posamentier, C.P. Summerhayes, B.U.Haq and G.P. Allen, eds., Sequence Stratigraphy and Facies7