Integrated sequence stratigraphy of Neogene deposits, New Jersey continental shelf and slope: Comparison with the Exxon model

Greenlee, Stephen M.; Devlin, William J.; Miller, Kenneth G.; Mountain, Gregory S.; Flemings, Peter B.

doi:10.1130/0016-7606(1992)104<1403:issond>2.3.co;2

Cited by 90 publications

(137 citation statements)

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“…The section above Reflector Blue (Greenlee et al, 1992;= m3 of Mountain, Miller, Blum, et al, 1994), dated as -13.6 Ma (see below), shows the most dramatic increase in progradation and channel cutting (Mountain et al, this volume). However, progradation began prior to this.…”

Section: Climatic and Sediment Supply Effects On Sedimentationmentioning

confidence: 99%

“…The most interesting result from Lindenkohl Canyon outcrop was the precise dating of a change from carbonate-dominated sedimentation in the late Eocene to siliciclastic deposition in the earliest Oli- Notes: * = possibly equivalent to the shelf reflectors of this color (Greenlee et al, 1992). ** = possibly equivalent to the shelf reflectors of this color (G.S.…”

Section: Alvin Samples and Other New Jersey Slope Boreholesmentioning

confidence: 99%

“…However, progradation began prior to this. Greenlee et al (1992) used industry wells to date well-developed prograding lower Miocene clinoforms beneath the modern inner shelf. suggested that shelf clinoforms began in the middle Oligocene by correlating to the cycle chart of Haq et al (1987).…”

Section: Climatic and Sediment Supply Effects On Sedimentationmentioning

confidence: 99%

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Oligocene to Middle Miocene Sr-Isotopic Stratigraphy of the New Jersey Continental Slope

Miller¹,

Liu²,

Feigenson³

1996

Proceedings of the Ocean Drilling Program, 150 Scientific Results

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We analyzed specimens of mixed planktonic foraminifer species for Sr isotopes from the Oligocene to middle Miocene sections from boreholes (Ocean Drilling Program Sites 902, 903, 904, and 906; and outcrops on the New Jersey continental slope. We concentrated on the upper Oligocene-middle Miocene at Sites 903 and 904 (444 and 1129 m present water depth, respectively), the upper Oligocene-lowermost Miocene at Site 902 (811m water depth), and slope outcrops in Carteret and Lindenkohl canyons. Sr-isotopic age estimates of the Ocean Drilling Program boreholes provide a good stratigraphic framework for upper Oligocene to middle Miocene sections, overcoming problems with rare calcareous plankton zonal markers. When integrated with ongoing biostratigraphic and magnetostratigraphic studies, the Leg 150 sites will provide a precise chronology of slope reflectors that also correlate with sequences boundaries traced under the continental shelf. Preliminary integration is encouraging: (1) nine of the 10 Oligocene to middle Miocene slope reflectors (sequence boundaries) correlate with global δ 18 θ increases and with sequence boundaries in the onshore New Jersey coastal plain, arguing for a causal link between formation of sequence boundaries and glacioeustatic lowerings; and (2) several hiatuses on the slope also correlate with reflectors and the major δ 18 θ increases, although many of the seismic reflectors appear to be conformable at the slope boreholes. Outcrop studies date a major change in depositional regime in the earliest Oligocene; this "siliciclastic switch" from an Eocene carbonate ramp to a starved siliciclastic early Oligocene margin correlates with a global δ 18 θ increase and a regional cooling. Sediment starvation in the early Oligocene resulted in a poorly preserved record on the slope. Sedimentation rates subsequently increased in the middle Oligocene on the entire margin, when prograding clinoforms appeared beneath the modern shelf and rates increased again in the early to middle Miocene. We attribute this progradational change to lower long-term sea level, although hinterland tectonics may have played an important role.

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Section: Climatic and Sediment Supply Effects On Sedimentationmentioning

confidence: 99%

Section: Alvin Samples and Other New Jersey Slope Boreholesmentioning

confidence: 99%

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Oligocene to Middle Miocene Sr-Isotopic Stratigraphy of the New Jersey Continental Slope

Miller¹,

Liu²,

Feigenson³

1996

Proceedings of the Ocean Drilling Program, 150 Scientific Results

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show abstract

“…Reflectors are picked at either a negative/dilatational pulse (-, shaded) or a positive/compressional pulse (+). * = Name given by Greenlee et al (1992) to a possibly equivalent shelf reflector or surface. ** = Correlated depths cannot be estimated using synthetic seismograms alone.…”

Section: Shipboard Compressional-wave Velocity and Density Datamentioning

confidence: 99%

“…Throughout the Neogene, clastic sediment bodies on this old continental passive margin were highly progradational because the accommodation space was small as a result of low thermal subsidence rates (Greenlee et al, 1992). Along the profile of Line 1027 (Fig.…”

Section: Strength Of Reflectionsmentioning

confidence: 99%

Seismic-to-Well Correlation of Seismic Unconformities at Leg 150 Continental Slope Sites

Lorenzo¹,

Hesselbo²

1996

Proceedings of the Ocean Drilling Program, 150 Scientific Results

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Seismic-to-well correlation at Ocean Drilling Program (ODP) continental slope Sites 902, 903, 904, and 906 identifies 19 Pleistocene-Eocene unconformable surfaces and reflectors. Seismic features on 120-channel, tuned, air-gun seismic data are tied to borehole depths via one-dimensional synthetic seismogram models. Reprocessed migrated seismic profiles along Maurice Ewing Lines 1005 and 1027 reveal clear images of two middle Miocene canyon-cutting surfaces and Pleistocene slumpbounding unconformities. At Site 904, good-quality compressional-wave velocity and density values allow models to match seismic facies. A high-amplitude continuous seismic facies between Miocene unconformities q and w can be attributed to distal toe-of-delta clinoforms containing alternating glauconite-rich and -poor sedimentary facies. A seaward-thinning Oligocene interval downlaps the upper Oligocene/upper Eocene, producing reflectors resolvable only through ties to biostratigraphic and lithologic borehole data. A silica-indurated diagenetic front within the middle Eocene produces reflectors that do not have chronostratigraphic significance and can mislead sequence stratigraphic interpretations.

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Glacially generated overpressure on the New England continental shelf: Integration of full‐waveform inversion and overpressure modeling

et al. 2014

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Localized zones of high-amplitude, discontinuous seismic reflections 100 km off the coast of Massachusetts, USA, have P wave velocities up to 190 m/s lower than those of adjacent sediments of equal depth (250 m below the sea floor). To investigate the origin of these low-velocity zones, we compare the detailed velocity structure across high-amplitude regions to adjacent, undisturbed regions through full-waveform inversion. We relate the full-waveform inversion velocities to effective stress and overpressure with a power law model. This model predicts localized overpressures up to 2.2 MPa associated with the high-amplitude reflections. To help understand the overpressure source, we model overpressure due to erosion, glacial loading, and sedimentation in one dimension. The modeling results show that ice loading from a late Pleistocene glaciation, ice loading from the Last Glacial Maximum, and rapid sedimentation contributed to the overpressure. Localized overpressure, however, is likely the result of focused fluid flow through a high-permeability layer below the region characterized by the high-amplitude reflections. These high overpressures may have also caused localized sediment deformation. Our forward models predict maximum overpressure during the Last Glacial Maximum due to loading by glaciers and rapid sedimentation, but these overpressures are dissipating in the modern, low sedimentation rate environment. This has important implications for our understanding continental shelf morphology, fluid flow, and submarine groundwater discharge off Massachusetts, as we show a mechanism related to Pleistocene ice sheets that may have created regions of anomalously high overpressure.

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Integrated sequence stratigraphy of Neogene deposits, New Jersey continental shelf and slope: Comparison with the Exxon model

Cited by 90 publications

References 0 publications

Oligocene to Middle Miocene Sr-Isotopic Stratigraphy of the New Jersey Continental Slope

Oligocene to Middle Miocene Sr-Isotopic Stratigraphy of the New Jersey Continental Slope

Seismic-to-Well Correlation of Seismic Unconformities at Leg 150 Continental Slope Sites

Glacially generated overpressure on the New England continental shelf: Integration of full‐waveform inversion and overpressure modeling

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