Tiffin, Sarah H.; McCarthy, Francine M. G. (2000): Mid-late Miocene palynology of the New Jersey margin; evidence from the Mid-Atlantic Transect (ODP Leg 174A and 174AX). Geological Society of America (GSA), Boulder, CO, United States, In: Anonymous, Geological Society of America, Northeastern Section, 35th annual meeting, 32 (1), 79, georefid:2003-017341
Abstract:
One of the main objectives of the Mid-Atlantic Transect is to improve the dating resolution of seismically imaged unconformity sequences, especially at sites where paleobathymetry was shallow enough to be sensitive to eustatic variations. Sites drilled on the continental shelf near New Jersey are critical for estimating the amplitude and timing of sea level change during the Icehouse interval. Until recently, the chronology of the Miocene sequences remained uncertain, as calcareous microfossil zonal markers are rare in these sediments. Palynological data (i.e. dinocysts and pollen) collected from ODP Leg 174A cores (1071 and 1072) and the Leg 174AX onshore cores (Ocean View and Bass River) allow middle and upper Miocene sequences to be correlated across the New Jersey shelf and onto the Atlantic Coastal Plain. Maximum and minimum ages have been assigned to sequence boundaries using the calibrated dinocyst zonation of de Verteuil and Norris (1996). Based on the dinocyst data, sequence boundary pp5(s) was identified as late Miocene in age (5.9-7.4 Ma) and not Plio-Pleistocene as was first assumed. Boundary m0.5(s) appears to have been generated between 7.4 and 9.2 Ma and m1 appears to be older than 11.4 Ma. Most samples analyzed from the Ocean View borehole unfortunately appear to be barren of palynomorphs, but a number of fossiliferous samples allow sediments to be correlated on the Mid-Atlantic Transect.
Coverage:
West: -75.3500 East: -72.1600 North: 41.2100 South: 38.3000
West: NaN East: NaN North: NaN South: NaN
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