Integrated biostratigraphy, paleobathymetry, and sequence stratigraphy of late Santonian-early Campanian sequences on New Jersey coastal plain; implication to global sea-level

Author(s): Mizintseva, Svetlana; Browning, James V.; Miller, Kenneth G.
Author Affiliation(s): Primary:
Rutgers University, Department of Geological Sciences, Piscataway, NJ, United States
Volume Title: Geological Society of America, 2007 annual meeting
Source: Abstracts with Programs - Geological Society of America, 39(6), p.150; Geological Society of America, 2007 annual meeting, Denver, CO, Oct. 28-31, 2007. Publisher: Geological Society of America (GSA), Boulder, CO, United States. ISSN: 0016-7592 CODEN: GAAPBC
Note: In English
Summary: The New Jersey Coastal Plain (NJCP) provides an excellent location for Cretaceous sea-level studies due to minimal regional tectonic influences (Kominz et al., 1998), and well-developed shallow marine fossiliferous sequences (Miller et al., 1998, 2004). Analysis of the sequences and paleowater depth fluctuations constrains the nature and timing of sea-level changes. Recent studies of the Santonian-Campanian section (Merchantville Formation) in two coreholes (Ancora and Bass River) on NJCP identified existence of concatenated sequences in glauconitic facies (Miller et al., 2004). The lithological expression of unconformities within the Merchantville glauconites is obscure and their resolution requires integrated stratigraphic approach. Here we present detailed litho- and biostratigraphic analyses of the Merchantville Formation sequences in four NJCP coreholes (Sea Girt, Ancora, Millville, and Bass River). Biofacies analysis reveals four benthic foraminiferal assemblages from inner to middle neritic environments. Correlation of the benthic foraminiferal biofacies, the percentage of planktonic foraminifera, and lithologic data suggested water depth estimates from 30 to 75 m. The correlation of the biostratigraphy, benthic foraminiferal biofacies, lithology, and gamma logs delineates unconformities, and identifies three sequences within the Merchantville Formation (Me1, Me2, Me3). The age of these sequences has been constrained by calcareous nannoplankton biostratigraphy (Me1: CC16; Me2: CC17-18; Me3: CC18-19) from 79.1 to 85.0 Ma. Three Merchantville sequences are evident within all four NJCP coreholes, suggesting that the sequences are regional in extent. Comparison of the New Jersey shallow marine sequences with the deep-sea oxygen isotope record from DSDP Site 511 (Falkland Plateau) revealed two episodes of sea-level decrease synchronous with the oxygen isotope increases. Our data imply that the Merchantville sequence boundaries may be attributed to the global cooling and ice volume increases. Our results support the contention that global sea-level changes during the peak warmth of the Cretaceous were controlled by ice volume variations. We propose future studies on detailed record of oxygen isotope and backstripping analysis of the late Santonian-Campanian interval.
Year of Publication: 2007
Research Program: DSDP Deep Sea Drilling Project
IPOD International Phase of Ocean Drilling
Key Words: 12 Stratigraphy, Historical Geology and Paleoecology; Assemblages; Atlantic Coastal Plain; Atlantic Ocean; Backstripping; Benthic taxa; Biofacies; Biostratigraphy; Boreholes; Campanian; Cooling; Cretaceous; DSDP Site 511; Deep Sea Drilling Project; Deep-sea environment; Fluctuations; Foraminifera; Global change; IPOD; Invertebrates; Isotope ratios; Isotopes; Leg 71; Lower Campanian; Marine environment; Merchantville Formation; Mesozoic; Microfossils; Nannoplankton; New Jersey; O-18/O-16; Oxygen; Paleobathymetry; Paleoclimatology; Paleotemperature; Plankton; Protists; Santonian; Sea-level changes; Senonian; Sequence stratigraphy; Shallow-water environment; South Atlantic; Stable isotopes; Unconformities; United States; Upper Cretaceous; Upper Santonian; Well logs
Coordinates: S510017 S510017 W0465818 W0465818
Record ID: 2009013894
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