Centennial to millennial variability of greenhouse climate across the mid-Cenomanian event
dc.citation.firstpage | 227 | |
dc.citation.issueNumber | 2 | |
dc.citation.journalTitle | Geology | |
dc.citation.lastpage | 231 | |
dc.citation.volumeNumber | 50 | |
dc.contributor.author | Ma, Chao | |
dc.contributor.author | Hinnov, Linda A. | |
dc.contributor.author | Eldrett, James S. | |
dc.contributor.author | Meyers, Stephen R. | |
dc.contributor.author | Bergman, Steven C. | |
dc.contributor.author | Minisini, Daniel | |
dc.contributor.author | Lutz, Brendan | |
dc.date.accessioned | 2022-03-24T13:31:42Z | |
dc.date.available | 2022-03-24T13:31:42Z | |
dc.date.issued | 2021 | |
dc.description.abstract | Centennial- to millennial-scale climate variations are often attributed to solar forcing or internal climate system variability, but recognition of such variations in the deep-time paleoclimate record is extremely rare. We present an exceptionally well-preserved, millimeter-scale laminated marlstone from a succession of precession-driven limestone-marlstone couplets deposited in the Western Interior Seaway (North America) immediately preceding and during the Cretaceous mid-Cenomanian event (ca. 96.5 Ma). Sedimentological, geochemical, and micropaleontological data indicate that individual pairs of light-dark laminae record alternations in the extent of water-column mixing and oxygenation. Principal component analysis of X-ray fluorescence element counts and a grayscale scan of a continuous thin section through the marlstone reveal variations with 80–100 yr, 200–230 yr, 350–500 yr, ∼1650 yr, and 4843 yr periodicities. A substantial fraction of the data indicates an anoxic bottom water variation with a pronounced 10,784 yr cycle. The centennial to millennial variations are reminiscent of those found in Holocene total solar irradiance variability, and the 10,784 yr anoxia cycle may be a manifestation of semi-precession-influenced Tethyan oxygen minimum zone waters entering the seaway. | |
dc.identifier.citation | Ma, Chao, Hinnov, Linda A., Eldrett, James S., et al.. "Centennial to millennial variability of greenhouse climate across the mid-Cenomanian event." <i>Geology,</i> 50, no. 2 (2021) The Geological Society of America: 227-231. https://doi.org/10.1130/G48734.1. | |
dc.identifier.digital | g48734-1 | |
dc.identifier.doi | https://doi.org/10.1130/G48734.1 | |
dc.identifier.uri | https://hdl.handle.net/1911/112046 | |
dc.language.iso | eng | |
dc.publisher | The Geological Society of America | |
dc.rights | This paper is published under the terms of the CC-BY license. | |
dc.rights.uri | https://creativecommons.org/licenses/by/4.0/ | |
dc.title | Centennial to millennial variability of greenhouse climate across the mid-Cenomanian event | |
dc.type | Journal article | |
dc.type.dcmi | Text | |
dc.type.publication | publisher version |
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