Abstract

Recent onshore New Jersey drilling (Ocean Drilling Program Leg 150X) provided excellent recovery of lower to middle Miocene sequences that we dated with Sr isotopic stratigraphy. Sequence boundaries correlate with deep-sea δ18O increases (inferred glacioeustatic lowerings), indicating a primary control by global sea-level change. Maryland Miocene outcrops appear to correlate with New Jersey sequences and the δ18O record, although diagenesis and intense bioturbation limit Sr isotopic age resolution in Maryland. The early Miocene is not well represented in Maryland due to regional tectonics; in contrast, early Miocene accommodation in New Jersey was provided by flexural effects due to sediment loading.

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