Authors
Stephen R Meyers, Bradley B Sageman, Michael A Arthur
Publication date
2012/9/1
Journal
Paleoceanography
Volume
27
Issue
3
Description
An analysis of orbitally influenced climate‐sensitive sedimentation is conducted across a meridional transect of the proto‐North Atlantic, to reconstruct the behavior of the carbon cycle and climate during Oceanic Anoxic Event 2 (OAE 2; ∼94 Ma). Midlatitude to near equatorial sites spanning deep‐ocean to shelf environments are evaluated using a new inverse method for the identification and calibration of orbital influence in ancient strata. The results yield consistent independent astrochronologies at each location—compatible with the recently published radioisotopic/astrochronologic time scale at the Cenomanian‐Turonian GSSP—and thus provide a unified high‐resolution temporal context for evaluation of the event. The proto‐North Atlantic astrochronologies document an amplification of obliquity power during OAE 2, indicating that obliquity was the dominant pacemaker of organic matter accumulation by the …
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