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Five depositional sequences in the coastal plain of New Jersey are correlated with the middle Maestrichtian to middle Eocene record at DSDP Site 605. Four of these sequences correlate closely with sea-level sequences TP1, TP2, TE1, and TE2 of Vail and others (1977). A middle to upper Maestrichtian sequence is also correlated with Site 605. A type 1 unconformity separates sequences TP1 and TP2.1. At Site 605 this unconformity is associated with seismic reflector A*(?). In the coastal plain type 2 unconformities are associated with sequences KMl (middle to upper Maestrichtian), TP2.1.2.2, 2.3, TE1.2, and 2.1. Between the coastal plain and Site 605, in the Baltimore Canyon Trough, the sequence record is incomplete because an unconformity separates the upper Campanian from the lower Eocene. This unconformity, named the East Coast Sequential Unconformity (ECSU), developed through sequential submarine erosion events which began in latest Campanian time and ended in earliest Eocene time. This erosion resulted from a cool, southward-flowing current system that alternately scoured (1) middle shelf to upper slope environments during high stands of sea level, and (2) various slope environments during low stands of sea level. This mechanism of erosion is distinct from and possibly in addition to other erosive mechanisms operating along the margin at this time, such as subaerial exposure along the inner shelf or canyon cutting along the slope. INTRODUCTION Site 605 is located on the upper continental rise 156 km (97 mi.) southeast of Atlantic City, New Jersey (Fig. 1). The hole was spudded in 2194 m of water, washed to 154 m sub-bottom depth, then continuously cored to 816.7 m. The site, which is near U.S. Geological Survey multichannel line 25, the baseline for the "New Jersey transect," was positioned to provide data which would link DSDP holes with outcrops, existing wells on land, and wells along the continental shelf (Fig. 2). The objectives were to obtain a better understanding of (1) the relationship between coastal plain, shelf, slope and rise deposits; (2) the origin of apparent unconformities visible on seismic profiles; and (3) the history of sea-level fluctuations. The nearly complete middle Maestrichtian to middle Eocene section is divided into lithologic Units II, III, IV, and V (Figs. 3, 4). Unit II consists of 153 m of middle Eocene biosiliceous, nannofossil chalk rich in foraminifers, radiolarians, and diatoms (van Hinte, et al., 1985). Unit III contains 214 m of lower Eocene, greenish gray, nannofossil limestone with varying amounts of foraminifers and calcified radiolarians. Upper Paleocene, dark greenish gray, clayey nannofossil-foraminiferal limestone (marl) comprises 176 m of Unit IV. Unit V, a lower Paleocene to middle Maestrichtian, olive gray, clayey, nannofossil foraminiferal limestone, is 77 m thick. Site 605 lies directly offshore of the coastal plain of New Jersey, where a well-known Maestrichtian to middle van Hinte, J. E., Wise, S. W., Jr., et al., Init. Repts. DSDP, 93: Washington (U.S. Govt. Printing Office). 2 Addresses: (Olsson) Dept. of Geological Sciences, Rutgers University, New Brunswick, NJ 08903; (Wise) Dept. of Geology, Florida State University, Tallahassee, FL 32306-3026. Eocene section is present (Olsson, 1980). In the coastal plain, deposition of sands, silts, and clays occurred for the most part in shelf environments. Glauconite is ubiquitious and is extremely abundant in some units. The entire section consists of alternating transgressive and regressive formations for which much biostratigraphic and paleoenvironmental data are available (Charletta, 1980; Olsson, 1980; Olsson and Nyong, 1984). Most of these biostratigraphic data are based on planktonic foraminifers, little on calcareous nannofossils. Thus it has not been possible to make comparisons of Tertiary nannofossil data between the New Jersey onshore and offshore sections. Futhermore, without nannofossil data it is difficult to constrain the chronostratigraphic extent of hiatuses in the coastal plain and at Site 605. In order to alleviate the lack of nannofossil data in the coastal plain, Paleogene well samples from the New Jersey coastal plain were studied for their nannofossil content, and range charts were prepared (Jiang and Wise, this volume). As a consequence, it is now possible to make a fairly detailed comparison of Site 605 with the coastal plain and, thereby to provide a better understanding of the geologic history of this segment of the western Atlantic passive margin. STRATIGRAPHY AND BIOSTRATIGRAPHY The stratigraphic record at Site 605 contains an exceptionally complete middle Eocene to lower upper Maestrichtian section (van Hinte et al., 1985). Oceanic reflector Horizons A and A*(?) were correlated by nannofossil biostratigraphy with the time scale of Berggren et al. (1985) as 49.5 Ma and 60 Ma, respectively, thus confirming the prediction of Vail et al. (1980). The correlation of reflector Horizon A* into Site 605 from Site 387,

Upper Maestrichtian to Middle Eocene Stratigraphy of the New Jersey Slope and Coastal Plain