Sugarman, P. J.; Miller, Kenneth G.; Monteverde, D. H. (2000): Sequence stratigraphic controls on hydrostratigraphy; examples from the New Jersey coastal plain. Geological Society of America (GSA), Boulder, CO, United States, In: Anonymous, Geological Society of America, Northeastern Section, 35th annual meeting, 32 (1), 76-77, georefid:2003-017327
Abstract:
NJ Coastal Plain drilling (ODP Legs 150X & 174AX) has shown that aquifer-confining couplets are sequences bounded by unconformities. Upper Highstand Systems Tracts (HST) consist of aquifer sands and lower HST consist of confining silts and clays. Transgressive Systems Tracts are generally comprised of glauconite sands that are too thin to be useful aquifers. Understanding the sequence stratigraphic framework of the coastal plain thus provides a means to predict the continuity and regional distribution of aquifer-confining unit. Although sequence stratigraphy is a powerful hydrostratigraphic tool, the updip-downdip and along strike relationships of aquifer-confining units is not clear in many cases. Two major aquifers occur within the Magothy Formation (?upper Turonian-lower Santonian) downdip at Bass River and updip at Ancora; sequence stratigraphic correlations suggest that these sequences correlate, though pollen data suggest that the lower sand at Bass River is older (lower Turonian). Two Englishtown aquifer HST sands (middle Campanian) have been mapped from Bass River; the upper sequence pinches out updip toward Ancora. The Mount Laurel Sand (upper Campanian) is a regionally continuous aquifer throughout much of the subsurface between Ancora and the coast. In updip locations (Ancora) and southern Ocean County, the upper Shark River Formation (upper middle Eocene) comprises a thick aquifer; this HST disappears to the south due to deeper water paleoenvironments. Miocene aquifers are particularly complex between Cape May and Atlantic City. For example, the 800 ft sand near Atlantic City is comprised of two sand bodies, associated HST of the Kirkwood Kw1a and Kw1b sequences. However, at Cape May, there are three sand bodies that could be mapped as the 800 ft sand. The highest of these aquifer sands is associated with the HST of the Kw1c sequence and pinches out between Cape May and Atlantic City. While the Kw1c sands are an important aquifer in the Cape May peninsula, they are a different stratigraphic unit than the 800 ft sand aquifer to the north.
Coverage:
West: -74.5900 East: -74.0300 North: 39.2000 South: 38.5500
West: NaN East: NaN North: NaN South: NaN
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