Dinoflagellate cysts in the Oligocene to Miocene sediments of IODP Site 318-U1356A


There is growing interest in the scientific community in reconstructing the paleoceanography of the Southern Ocean during the Oligocene-Miocene because these time intervals experienced atmospheric CO2 concentrations with relevance to our future. However, it has remained notoriously difficult to put the sedimentary archives used in these efforts into a temporal framework. This is at least partially due to the fact that the bio-events recorded in organic-walled dinoflagellate cysts (dinocysts), which often represent the only microfossil group preserved, have not yet been calibrated to the international time scale. We here present dinocyst ranges from Oligocene-Miocene sediments drilled offshore the Wilkes Land continental margin, East Antarctica (Integrated Ocean Drilling Program (IODP) Hole U1356A). In addition, we apply statistical means to test a priori assumptions about whether the recorded taxa were deposited in situ or were reworked from older strata. Moreover, we describe two new dinocyst species, Selenopemphix brinkhuisii sp. nov. and Lejeunecysta adeliensis sp. nov., which are identified as important markers for regional stratigraphic analysis. Finally, we calibrate all identified dinocyst events to the international time scale using independent age control from calcareous nannoplankton and magnetostratigraphy from IODP Hole U1356A, and propose a provisional dinoflagellate cyst zonation scheme for the Oligocene-Miocene of the Southern Ocean.

Supplement to: Bijl, Peter K; Houben, Alexander J P; Bruls, Anja; Pross, Jörg; Sangiorgi, Francesca (2018): Stratigraphic calibration of Oligocene–Miocene organic-walled dinoflagellate cysts from offshore Wilkes Land, East Antarctica, and a zonation proposal. Journal of Micropalaeontology, 37(1), 105-138

DOI https://doi.org/10.1594/PANGAEA.883747
Related Identifier IsSupplementTo https://doi.org/10.5194/jm-37-105-2018
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.883747
Creator Bijl, Peter K ORCID logo; Houben, Alexander J P ORCID logo; Bruls, Anja; Pross, Jörg; Sangiorgi, Francesca ORCID logo
Publisher PANGAEA
Publication Year 2017
Rights Creative Commons Attribution 3.0 Unported; https://creativecommons.org/licenses/by/3.0/
OpenAccess true
Resource Type Supplementary Dataset; Dataset
Format text/tab-separated-values
Size 63528 data points
Discipline Earth System Research
Spatial Coverage (135.999 LON, -63.310 LAT)