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Global implications of lower to middle Eocene sequence boundaries on the New Jersey coastal plain; the icehouse cometh

James V. Browning, Kenneth G. Miller and Dorothy K. Pak
Global implications of lower to middle Eocene sequence boundaries on the New Jersey coastal plain; the icehouse cometh
Geology (Boulder) (July 1996) 24 (7): 639-642

Abstract

We document nine lower-middle Eocene sequences on the New Jersey coastal plain and compare them with global delta (super 18) O and Haq et al. records. Early Eocene hiatuses do not match delta (super 18) O changes, and it is unlikely that they are the result of glacioeustasy, consistent with an ice-free early Eocene. Early-middle Eocene (49 - 43 Ma) evidence for a link between sequences and delta (super 18) O is equivocal, and the presence of large ice sheets is uncertain. Beginning in the late-middle Eocene (43 - 42 Ma), concomitant increases in planktonic and benthic delta (super 18) O records coincide with the timing of hiatuses on the New Jersey coastal plain and a change from carbonate-dominated to siliciclastic-dominated sedimentation. These represent the development of the Antarctic ice cap and the beginning of the "icehouse" world. Of the 14 sequences predicted by Haq et al. for this interval, 9 are resolvable on the New Jersey margin, and the other 5 appear to be combined with others. We conclude that although ice-volume changes controlled sequences since at least 42 Ma, mechanisms for sea-level change prior to then are still not fully understood.


ISSN: 0091-7613
EISSN: 1943-2682
Coden: GLGYBA
Serial Title: Geology (Boulder)
Serial Volume: 24
Serial Issue: 7
Title: Global implications of lower to middle Eocene sequence boundaries on the New Jersey coastal plain; the icehouse cometh
Affiliation: Rutgers University, Department of Geological Sciences, Piscataway, NJ, United States
Pages: 639-642
Published: 199607
Text Language: English
Publisher: Geological Society of America (GSA), Boulder, CO, United States
References: 26
Accession Number: 1996-054293
Categories: StratigraphyIsotope geochemistry
Document Type: Serial
Bibliographic Level: Analytic
Annotation: Lamont-Doherty Earth Obs., Contrib. No. 5482
Illustration Description: illus. incl. 2 tables
N39°15'00" - N40°10'00", W74°40'00" - W74°00'00"
Secondary Affiliation: Lamont-Doherty Earth Observatory of Columbia University, Palisades, NY, USA, United States
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States
Update Code: 199618
Program Name: DSDPDeep Sea Drilling Project
Program Name: ODPOcean Drilling Program
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