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We review Phanerozoic sea-level changes [543 million years ago (Ma) to the present] on various time scales and present a new sea-level record for the past 100 million years (My). Long-term sea level peaked at 100 +/- 50 meters during the Cretaceous, implying that ocean-crust production rates were much lower than previously inferred. Sea level mirrors oxygen(More)
On the basis of a carbon isotopic record of both marine carbonates and organic matter from the Triassic-Jurassic boundary to the present, we modeled oxygen concentrations over the past 205 million years. Our analysis indicates that atmospheric oxygen approximately doubled over this period, with relatively rapid increases in the early Jurassic and the(More)
Global cooling and the development of continental-scale Antarctic glaciation occurred in the late middle Eocene to early Oligocene (~38 to 28 million years ago), accompanied by deep-ocean reorganization attributed to gradual Antarctic Circumpolar Current (ACC) development. Our benthic foraminiferal stable isotope comparisons show that a large δ(13)C offset(More)
The Paleocene/Eocene thermal maximum (PETM) was a time of rapid global warming in both marine and continental realms that has been attributed to a massive methane (CH 4) release from marine gas hydrate reservoirs. Previously proposed mechanisms for this methane release rely on a change in deepwater source region(s) to increase water temperatures rapidly(More)
The following, who are listed in alphabetic order, are responsible for the given section: drilling during Leg 174A. Drilling at Bethany Beach targeted Miocene sequences at a point where they reach their maximum regional thickness onshore (i.e., the depocenter of the Salisbury Embayment). Recovery was very good (mean recovery = 80%), and a full suite of(More)
The following, who are listed in alphabetical order, are responsible for the given section: targeted upper Miocene through middle Eocene sequences. Recovery was very good (mean recovery = 81%), ending at a total depth (TD) of 1575 ft (480.06 m) in lowermost middle Eocene sediments. A full suite of slimline logs was obtained to 1123 ft (342.29 m), and a(More)
The following, who are listed in alphabetical order, are responsible for the given section: The Ancora borehole was the fifth site drilled as part of the New Jersey Coastal Plain Drilling Project and the second site drilled as part of Ocean Drilling Program (ODP) Leg 174AX, which complements shelf drilling conducted during Leg 174A. Drilling at Ancora, New(More)
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