Eocene-Oligocene sea-level changes on the New Jersey coastal plain linked to the deep-sea record
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Abstract
We use magnetostratigraphy and Sr-isotope stratigraphy to improve stratigraphic control for the Eocene to Oligocene of the New Jersey coastal plain (ACGS4 borehole). Magnetostratigraphy in many cases is complicated in outcrop sections of shallow-water (<200 m paleodepth) sediments by low remanence and weathering; we minimize these problems by analyzing large samples obtained from the ACGS4 borehole and construct a firm magnetochronology for the early to middle Eocene. Sr-isotope stratigraphy confirms biostratigraphic evidence for a previously unknown uppermost Eocene to lowermost Oligocene unit and delineates a "middle" Oligocene hiatus that is unresolvabie using biostratigraphy alone. We recognize hiatuses and associated unconformities on the New Jersey margin near the lower Eocene/middle Eocene boundary, within the middle Eocene, and in the "middle" Oligocene and correlate these events with similar hiatuses observed in other continental-shelf, slope, and epicontinental settings. In addition, a hiatus probably occurred near the middle Eocene/upper Eocene boundary. We conclude that the interregional distribution of these Eocene-Oligocene hiatuses indicates a global cause: eustatic change.
Study Area
Publication type | Article |
---|---|
Publication Subtype | Journal Article |
Title | Eocene-Oligocene sea-level changes on the New Jersey coastal plain linked to the deep-sea record |
Series title | GSA Bulletin |
DOI | 10.1130/0016-7606(1990)102%3C0331:EOSLCO%3E2.3.CO;2 |
Volume | 102 |
Issue | 34 |
Year Published | 1990 |
Language | English |
Publisher | Geological Society of America |
Contributing office(s) | Eastern Geology and Paleoclimate Science Center, St. Petersburg Coastal and Marine Science Center |
Description | 9 p. |
First page | 331 |
Last page | 339 |
Country | United States |
State | New Jersey |
Google Analytic Metrics | Metrics page |