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Herrle, Jens O; Friedrich, Oliver; Hemleben, Christoph (2003): Calcareous nannofossils, palynomorphs and benthic foraminifera of section L´Arboudeysse. PANGAEA,, Supplement to: Herrle, Jens O; Pross, Jörg; Friedrich, Oliver; Hemleben, Christoph (2003): Short-term environmental changes in the Cretaceous Tethyan Ocean: micropaleontological evidence from the Early Albian Oceanic anoxic event 1b. Terra Nova, 15(1), 14-19,

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To better understand the linkage between climate and ocean circulation under greenhouse conditions we have studied calcareous nannofossils, palynomorphs and benthic foraminifera from the Early Albian Oceanic Anoxic Event 1b black shale (OAE 1b) in the Vocontian Basin (SE France). We propose that monsoonal activity resulting from precessional forcing and modulated by eccentricity-driven temperature changes represents the driving factor of OAE 1b formation in low latitudes. With the onset of OAE 1b, increasingly warm and humid conditions, stronger winds and enhanced terrestrial input led to higher surface water productivity. Therefore, increased productivity is an important factor for OAE 1b formation in the Vocontian Basin. However, monsoonally forced productivity changes are a regional climate signal only. The supraregional occurrence of the OAE 1b is probably due to a reduction of deep water formation in the low latitudes under extremely warm and humid conditions, leading to enhanced preservation of organic matter.
Date/Time Start: 1998-08-15T00:00:00 * Date/Time End: 1998-08-15T00:00:00
Minimum DEPTH, sediment/rock: 0.03 m * Maximum DEPTH, sediment/rock: 13.83 m
LArboudeysse * Date/Time: 1998-08-15T00:00:00 * Elevation Start: 833.0 m * Elevation End: 0.0 m * Location: Vocontian Basin, SE France * Campaign: SFB275_campaign * Method/Device: Profile sampling (PROFILE)
Method see Geisen et al, 1999, Micropaleontology; Wood et al., 1996, Am Ass Strati Palynol Found
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1DEPTH, sediment/rockDepthmGeocode
2Sample code/labelSample labelHerrle, Jens O
3Nutrient indexNIHerrle, Jens OCalculated
4Temperature indexTIHerrle, Jens OCalculated
5Terrigenous/marine ratioTerr/MarHerrle, Jens OCalculated
6Benthic foraminifera as eutrophic indicatorsBenth foram eutr%Herrle, Jens O
7Foraminifera, benthicForam bent#/gHerrle, Jens OCounting
730 data points

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