Hötzel, Sebastian; Dupont, Lydie M; Marret, Fabienne; Jung, Gerlinde; Wefer, Gerold (2016): Dinoflagellate cyst counts of ODP Site 1081, Benguela Upwelling, Miocene-Pliocene [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.858185, Supplement to: Hötzel, S et al. (2016): Steps in the intensification of Benguela upwelling over the Walvis Ridge during Miocene and Pliocene. International Journal of Earth Sciences, 1-13, https://doi.org/10.1007/s00531-016-1309-0
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Abstract:
Using the Late Miocene to Pliocene organic-walled dinoflagellate cyst record of ODP Site 1081 we reconstruct and discuss the early upwelling history over the Walvis Ridge with a special focus on the movement of the Angola-Benguela Front (ABF). We suggest that during the Late Miocene the Angola Current flowed southwards over the Walvis Ridge more frequently than today because the ABF was probably located further south as a result of a weaker meridional temperature gradient. A possible strengthening of the meridional gradient during the latest Miocene to early Pliocene in combination with uplift of south-western Africa intensified the upwelling along the coast and increased the upwelling's filaments over the Walvis Ridge. An intermediate period from 6.2 to 5.5 Ma is shown by the dominance of Habibacysta tectata, cysts of a cool-tolerant dinoflagellate known from the northern Atlantic, indicating changing oceanic conditions contemporaneous with the Messinian Salinity Crisis. From 4.3 Ma on, the upwelling signal got stronger again and waters were well-mixed and nutrient-rich. Our results indicate a northward migration of the ABF as early as 7 Ma and the initial stepwise intensification of the BUS.
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Latitude: -19.619690 * Longitude: 11.319300
Date/Time Start: 1997-09-09T02:00:00 * Date/Time End: 1997-09-11T21:15:00
Minimum DEPTH, sediment/rock: 198.27 m * Maximum DEPTH, sediment/rock: 448.12 m
Event(s):
175-1081A * Latitude: -19.619690 * Longitude: 11.319300 * Date/Time Start: 1997-09-09T02:00:00 * Date/Time End: 1997-09-11T21:15:00 * Elevation: -794.1 m * Penetration: 452.7 m * Recovery: 393.48 m * Location: Benguela Current, South Atlantic Ocean * Campaign: Leg175 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 49 cores; 452.7 m cored; 0 m drilled; 86.9 % recovery
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | DEPTH, sediment/rock | Depth sed | m | Dupont, Lydie M | Geocode | |
| 2 | AGE | Age | ka BP | Dupont, Lydie M | Geocode | |
| 3 | Sample code/label | Sample label | Dupont, Lydie M | |||
| 4 | Impagidinium spp. | Impagidinium spp. | # | Dupont, Lydie M | Counting, dinoflagellate cysts | |
| 5 | Impagidinium aculeatum | I. aculeatum | # | Dupont, Lydie M | Counting, dinoflagellate cysts | |
| 6 | Impagidinium paradoxum | I. paradoxum | # | Dupont, Lydie M | Counting, dinoflagellate cysts | |
| 7 | Impagidinium sphaericum | I. sphaericum | # | Dupont, Lydie M | Counting, dinoflagellate cysts | |
| 8 | Impagidinium patulum | I. patulum | # | Dupont, Lydie M | Counting, dinoflagellate cysts | |
| 9 | Impagidinium strialatum | I. strialatum | # | Dupont, Lydie M | Counting, dinoflagellate cysts | |
| 10 | Impagidinium species 2 after De Schepper & Head (2009) | Impagidinium sp. 2 | # | Dupont, Lydie M | Counting, dinoflagellate cysts | |
| 11 | Operculodinium spp. | Operculodinium spp. | # | Dupont, Lydie M | Counting, dinoflagellate cysts | |
| 12 | Operculodinium janduchenei | O. janduchenei | # | Dupont, Lydie M | Counting, dinoflagellate cysts | |
| 13 | Operculodinium centrocarpum | O. centrocarpum | # | Dupont, Lydie M | Counting, dinoflagellate cysts | |
| 14 | Operculodinium israelianum | O. israelianum | # | Dupont, Lydie M | Counting, dinoflagellate cysts | |
| 15 | Pentapharsodinium dalei | P. dalei | # | Dupont, Lydie M | Counting, dinoflagellate cysts | |
| 16 | Lingulodinium machaerophorum | L. machaerophorum | # | Dupont, Lydie M | Counting, dinoflagellate cysts | |
| 17 | Brigantedinium spp. | Brigantedinium spp. | # | Dupont, Lydie M | Counting, dinoflagellate cysts | |
| 18 | Selenopemphix nephroides | S. nephroides | # | Dupont, Lydie M | Counting, dinoflagellate cysts | |
| 19 | Selenopemphix brevispinosa | S. brevispinosa | # | Dupont, Lydie M | Counting, dinoflagellate cysts | |
| 20 | Selenopemphix brevispinosa conspicua | S. brevispinosa conspicua | # | Dupont, Lydie M | Counting, dinoflagellate cysts | |
| 21 | Selenopemphix quanta | S. quanta | # | Dupont, Lydie M | Counting, dinoflagellate cysts | |
| 22 | Selenopemphix armageddonensis | S. armageddonensis | # | Dupont, Lydie M | Counting, dinoflagellate cysts | |
| 23 | Spiniferites spp. | Spiniferites spp. | # | Dupont, Lydie M | Counting, dinoflagellate cysts | |
| 24 | Spiniferites ramosus | S. ramosus | # | Dupont, Lydie M | Counting, dinoflagellate cysts | |
| 25 | Spiniferites mirabilis | S. mirabilis | # | Dupont, Lydie M | Counting, dinoflagellate cysts | |
| 26 | Spiniferites cf. mirabilis | S. cf. mirabilis | # | Dupont, Lydie M | Counting, dinoflagellate cysts | |
| 27 | Spiniferites membranaceus | S. membranaceus | # | Dupont, Lydie M | Counting, dinoflagellate cysts | |
| 28 | Acomosphaera spp. | Acomosphaera spp. | # | Dupont, Lydie M | Counting, dinoflagellate cysts | |
| 29 | Nematosphaeropsis labyrinthus | N. labyrinthus | # | Dupont, Lydie M | Counting, dinoflagellate cysts | |
| 30 | Batiacasphaera micropapillata | B. micropapillata | # | Dupont, Lydie M | Counting, dinoflagellate cysts | |
| 31 | Batiacasphaera hirsuta | B. hirsuta | # | Dupont, Lydie M | Counting, dinoflagellate cysts | |
| 32 | Trinovantedinium glorianum | T. glorianum | # | Dupont, Lydie M | Counting, dinoflagellate cysts | |
| 33 | Trinovantedinium papula | T. papula | # | Dupont, Lydie M | Counting, dinoflagellate cysts | |
| 34 | Trinovantedinium ferugnomatum | T. ferugnomatum | # | Dupont, Lydie M | Counting, dinoflagellate cysts | |
| 35 | Trinovantedinium applanatum | T. applanatum | # | Dupont, Lydie M | Counting, dinoflagellate cysts | |
| 36 | Tuberculodinium vancampoae | T. vancampoae | # | Dupont, Lydie M | Counting, dinoflagellate cysts | |
| 37 | Pyxidinopsis reticulata | P. reticulata | # | Dupont, Lydie M | Counting, dinoflagellate cysts | |
| 38 | Habibacysta tectata | H. tectata | # | Dupont, Lydie M | Counting, dinoflagellate cysts | |
| 39 | Lejeunecysta spp. | Lejeunecysta spp. | # | Dupont, Lydie M | Counting, dinoflagellate cysts | |
| 40 | Lejeunecysta oliva | L. oliva | # | Dupont, Lydie M | Counting, dinoflagellate cysts | |
| 41 | Lejeunecysta sabrina | L. sabrina | # | Dupont, Lydie M | Counting, dinoflagellate cysts | |
| 42 | Ataxiodinium zevenboomii | A. zevenboomii | # | Dupont, Lydie M | Counting, dinoflagellate cysts | |
| 43 | Ataxiodinium confusum | A. confusum | # | Dupont, Lydie M | Counting, dinoflagellate cysts | |
| 44 | Quinquecuspis concreta | Q. concreta | # | Dupont, Lydie M | Counting, dinoflagellate cysts | |
| 45 | Sumatradinium soucouyantiae | S. soucouyantae | # | Dupont, Lydie M | Counting, dinoflagellate cysts | |
| 46 | Dinoflagellate cyst indeterminata | Dinofl indet | # | Dupont, Lydie M | Counting, dinoflagellate cysts | varia |
| 47 | Dinoflagellates, total | Dinofl total | # | Dupont, Lydie M | Counting, dinoflagellate cysts | |
| 48 | Marker, found | Mark found | # | Dupont, Lydie M | Counting, dinoflagellate cysts | |
| 49 | Volume | Vol | ml | Dupont, Lydie M | Counting, dinoflagellate cysts | |
| 50 | Marker, added | Mark add | # | Dupont, Lydie M | Counting, dinoflagellate cysts |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
3408 data points
Download Data
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