Title
Stratigraphic calibration of Oligocene-Miocene organic-walled dinoflagellate cysts from offshore Wilkes Land, East Antarctica, and a zonation proposal
Author
Bijl, P.K.
Houben, A.J.P.
Bruls, A.
Pross, J.
Sangiorgi, F.
Publication year
2018
Abstract
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 bioevents recorded in organic-walled dinoflagellate cysts (dinocysts), which often represent the only microfossil group preserved, have not yet been calibrated to the international timescale. Here we 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 timescale using independent age control from calcareous nanoplankton and magnetostratigraphy from IODP Hole U1356A, and we propose a provisional dinoflagellate cyst zonation scheme for the Oligocene-Miocene of the Southern Ocean. © Author(s) 2018.
Subject
2015 Geo
PG - Petroleum Geosciences
ELSS - Earth, Life and Social Sciences
Geological Survey Netherlands
Geosciences
2015 Energy
Biostratigraphy
Calibration
Deposition
Dinoflagellate cyst
Marine isotope stage
Ocean Drilling Program
Oligocene
East Antarctica
To reference this document use:
http://resolver.tudelft.nl/uuid:ea8605c1-3687-47ee-b983-8bbb3d80e529
DOI
https://doi.org/10.5194/jm-37-105-2018
TNO identifier
784894
ISSN
0262-821X
Source
Journal of Micropalaeontology, 37 (1), 105-138
Document type
article