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The AAPG/Datapages Combined Publications Database
Journal of Sedimentary Research (SEPM)
Abstract
DOI: 10.2110/jsr.2020.53
Sequence
stratigraphic framework of the mid-Cretaceous nonmarine Potomac Formation, New Jersey and Delaware
Abstract
We developed a sequence
stratigraphic framework for the (Barremian to lower Cenomanian) fluvial–deltaic (primarily delta plain) Potomac Formation in the Medford, New Jersey, Fort Mott, New Jersey, and Summit Marina, Delaware coreholes. Previous studies have correlated distinctive lithologic units with attendant pollen zones and identified tentative
sequence
boundaries between lithologic units I (Barremian to lower Aptian, pollen Zone I), II (Aptian to lowermost Cenomanian, pollen Zone II), and III (lower Cenomanian, pollen Zone III) at all three sites. Here, we further subdivide these units into packages known as fluvial aggradation cycles (FACs). An
analysis
of FAC stacking patterns reveals potential
sequence
boundaries and systems tracts. FACs indicate that major lithologic unit boundaries are also
sequence
boundaries, indicate tentative higher-order
sequence
boundaries, and provide potential additional correlative surfaces among Potomac Formation sites. Our study demonstrates the applicability of the FAC method to identify stacking patterns and
sequence
stratigraphic surfaces in fluvial–deltaic deposits and demonstrates that FACs are excellent tools to decipher the difficult-to-correlate surfaces.
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