Strontium-isotope and sequence stratigraphy of the Miocene Kirkwood Formation, southern New Jersey

Sugarman, Peter J.; Miller, Kenneth G.; Owens, James Patrick; Feigenson, Mark D.

doi:10.1130/0016-7606(1993)105<0423:siasso>2.3.co;2

Cited by 61 publications

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“…We cannot determine definitively whether the maximum flooding surface (MFS) and the top of the TST coincides with the glauconitic intervals or if they are higher in the section and coincide with peak abundances of Uvigerina. The HST sands are absent in the upper Eocene sequences probably because of their deposition in deeper water than the Miocene examples of Sugarman et al (1993).…”

Section: Methodsmentioning

confidence: 99%

“…In the New Jersey coastal plain, lowstand systems tracts (LST) are generally absent and only the transgressive (TST) and highstand (HST) systems tracts have been identified. Typical New Jersey Miocene and Oligocene sequences have sand, often containing glauconite, at the base, interpreted as the TST, overlain by lower HST clays and silts with upper HST sands at the top (Sugarman et al, 1993;Pekar et al, Chapter 15, this volume). The TSTs in the Miocene and Oligocene are generally thin and sequences are dominated by the HST (Miller et al,Chapter 14,this volume;Pekar et al,Chapter 15,this volume).…”

Section: Methodsmentioning

confidence: 99%

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Upper Eocene sequence stratigraphy and the Absecon Inlet Formation, New Jersey Coastal Plain

Browning¹,

Miller²,

Bybell³

1997

Proceedings of the Ocean Drilling Program, 150X Scientific Results

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We evaluate the age, benthic biofacies, and sequence stratigraphy of thick and well-recovered upper Eocene sediments from the New Jersey Coastal Plain. These strata are herein defined as a lithostratigraphic unit and named the Absecon Inlet Formation. The formation is divided into upper and lower portions. At its type locality in the Atlantic City borehole, the lower portion of the Absecon Inlet Formation consists of 171 ft (52 m) of glauconitic silts and silty clays and is assigned to calcareous nannoplankton Zone NP 19/20 (late Eocene). At the ACGS#4 borehole, the type locality for its upper portion, the formation consists of slightly sandy clays and is assigned to Zone NP 21 (late Eocene to earliest Oligocene). The continuous stratigraphic occurrence of Hantkenina spp. in these sediments is evidence of an Eocene age for the upper portion of the Absecon Inlet Formation. Benthic foraminiferal analysis reveals five biofacies in the Absecon Inlet Formation, three of which can be related to paleowater depth: a Siphonina biofacies inhabited water depths of 75 ± 25 m; a Cibicidoides biofacies inhabited water depths of 100 ± 30 m; and a Globobulimina biofacies inhabited water depths of 125 ± 30 m. In addition, a Gyroidinoides biofacies occurs only within transgressive systems tracts. A Bulimina jacksonensis biofacies is believed to be related to a circum-Atlantic paleoceanographic event unrelated to depth changes on the shelf. Gamma-log, lithologic, and faunal/floral data are used to interpret the sequence stratigraphic architecture of the Absecon Inlet Formation. We conclude that the timing of unconformities (sequence boundaries) and maximum flooding surfaces within the Absecon Inlet Formation is consistent with the eustatic record of Exxon and the global δ 18 O record.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Upper Eocene sequence stratigraphy and the Absecon Inlet Formation, New Jersey Coastal Plain

Browning¹,

Miller²,

Bybell³

1997

Proceedings of the Ocean Drilling Program, 150X Scientific Results

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“…For New Jersey samples, few diagenetic problems have been documented (Sugarman et al, 1993;Miller, et al, 1994). However, diagenetic problems were encountered in the Maryland Miocene section and attributed to postdepositional exchanges in aragonitic shells.…”

Section: Methodsmentioning

confidence: 99%

“…However, shallow-water (<100 m) chronologic control is often limited because of problems with facies controls on magnetobiostratigraphy (Miller and Kent, 1987). Srisotope stratigraphy circumvents these problems and can provide a chronology for critical Oligocene to Holocene "Icehouse" sequences (Sugarman et al, 1993).…”

Section: Introductionmentioning

confidence: 99%

“…Biostratigraphic correlations of Miocene sequences in New Jersey primarily rely on diatoms (Abbott, 1978;Andrews, 1988) that are not yet precisely calibrated to the time scale. Sugarman et al (1993) applied Sr-isotopic studies to the first continuously cored boreholes in New Jersey, ACGS#4 and Belleplain ( Fig. 1), to decipher the sequence stratigraphy of the Miocene Kirkwood Formation and calibrate it to the time scale.…”

Section: Introductionmentioning

confidence: 99%

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Strontium-isotopic correlation of Oligocene to Miocene sequences, New Jersey and Florida

Sugarman¹,

McCartan²,

Miller³

et al. 1997

Proceedings of the Ocean Drilling Program, 150X Scientific Results

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We use Sr-isotopic age estimates to date siliciclastic, carbonate, and mixed siliciclastic-carbonate Oligocene and Miocene sequences for the New Jersey Coastal Plain and Florida Peninsula and to correlate sequence boundaries with the deep-sea δ 18 O record and the inferred eustatic record of Exxon. The New Jersey onshore Oligocene to lower Miocene sequences correlate reasonably well with the Florida Miocene sequences. However, the majority of middle Miocene sequences mapped in New Jersey are missing from central Florida. The age of Oligocene to Miocene sequence boundaries determined in continuous boreholes from New Jersey, Alabama, and Florida show excellent correlation with deep-sea δ 18 O increases, which are inferred glacioeustatic lowerings. This is strong confirmation that global sea-level change is a primary control on the timing of Oligocene to Miocene sequence boundaries for the coastal plain sections studied here.Whereas global sea level has a significant influence on coastal plain sequences, there are major differences in the preservation of sequences within the same depositional basin (e.g., Salisbury Embayment) and between basins (e.g., Florida basins vs. Salisbury Embayment). These intra-and interbasinal differences must be ascribed to noneustatic processes such as tectonics or differential erosion. Tectonic mechanisms include faulting of crustal blocks, mobile basins with evolving arches and depocenters, local flexural subsidence, or differential subsidence caused by sediment loading.

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Exposure age and erosional history of an upland planation surface in the US Atlantic Piedmont

Stanford¹,

Seidl²,

Ashley³

2000

Earth Surf. Process. Landforms

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The upland planation surface in the Piedmont of central New Jersey consists of summit flats, as much as 130 km 2 in area, that truncate bedding and structure in diabase, basalt, sandstone, mudstone and gneiss. These flats define a low-relief regional surface that corresponds in elevation to residual hills in the adjacent Coastal Plain capped by a fluvial gravel of late Miocene age. A Pliocene fluvial sand is inset 50 m below the upland features. These associations suggest a late Miocene or early Pliocene age for the surface. To assess exposure age and erosional history, a 4Á4 m core of clayey diabase saprolite on a 3 km 2 remnant of the surface was sampled at six depths for atmospherically produced cosmogenic 10 Be. The measured inventory, assuming a deposition rate of 1Á3 Â 10 6 atoms cm À2 a À1, yields a minimum exposure age of 227 000 years, or, assuming continuous surface erosion, a constant erosion rate of 10 m Ma À1 . Because the sample site lies about 60 m above the aggradation surface of the Pliocene fluvial deposit, and itself supports a pre-Pliocene fluvial gravel lag, this erosion rate is too high. Rather, episodic surface erosion and runoff bypassing probably have produced an inventory deficit. Reasonable estimates of surface erosion (up to 10 m) and bypassing (up to 50 per cent of total precipitation) yield exposure ages of as much as 6Á4 Ma. These results indicate that (1) the surface is probably of pre-Pleistocene age and has been modified by Pleistocene erosion, and (2) exposure ages based on 10 Be inventories are highly sensitive to surface erosion and runoff bypassing.

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Strontium-isotope and sequence stratigraphy of the Miocene Kirkwood Formation, southern New Jersey

Cited by 61 publications

References 0 publications

Upper Eocene sequence stratigraphy and the Absecon Inlet Formation, New Jersey Coastal Plain

Upper Eocene sequence stratigraphy and the Absecon Inlet Formation, New Jersey Coastal Plain

Strontium-isotopic correlation of Oligocene to Miocene sequences, New Jersey and Florida

Exposure age and erosional history of an upland planation surface in the US Atlantic Piedmont

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