- journal_title：Geological Society of America Bulletin
- Contributor：KENNETH G. MILLER ; DENNIS V. KENT ; ANDREW N. BROWER ; LAUREL M. BYBELL ; MARK D. FEIGENSON ; RICHARD K. OLSSON ; RICHARD Z. POORE
- Publisher：Geological Society of America
- Date：1990-
- Format：text/html
- Language：en
- Identifier：10.1130/0016-7606(1990)102<0331:EOSLCO>2.3.CO;2
- journal_abbrev：Geological Society of America Bulletin
- issn：0016-7606
- volume：102
- issue：3
- firstpage：331
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.