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(Table T1) Dinoflagellate cyst abundance in ODP Hole 171B-1053A sediments (2000)

van Mourik, Caroline A ; Brinkhuis, Henk

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In: Supplement to: van Mourik, Caroline A; Brinkhuis, Henk (2000): Data report: Organic walled dinoflagellate cyst biostratigraphy of the latest middle to late Eocene at Hole 1053A (subtropical Atlantic Ocean). In: Kroon, D; Norris, RD; Klaus, A (eds.) Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 171B, 1-25, https://doi.org/10.2973/odp.proc.sr.171B.121.2000

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Publication Date: 2024-01-09

Description: Site 1053 is located at the top of an escarpment cut into the upper part of Blake Nose (29°59.5385'N, 76°31.4135'W). The total core recovery was 189.5 m of upper middle to upper Eocene deposits. An exceptionally thick upper Eocene section was recovered, consisting mainly of siliceous nannofossil ooze (Norris, Kroon, Klaus, et al., 1998, doi:10.2973/odp.proc.ir.171B.1998). These Eocene sediments are unconsolidated as they were not buried by younger deposits. This chapter discusses the distribution of organic walled dinoflagellate cysts (dinocysts) at Hole 1053A. Bio(chrono)stratigraphic divisions cited here follow the initial assignment by the Leg 171B Shipboard Scientific Party (Norris, Kroon, Klaus, et al., 1998, doi:10.2973/odp.proc.ir.171B.1998).

Keywords: 171-1053A; Achomosphaera sp.; Achomosphaera spp.; Areoligera sp.; Areosphaeridium diktyoplokus; Batiacasphaera compta; Carolina Slope, North Atlantic Ocean; Cassidium fragile; Cerebrocysta bartonensis; Charlesdowniea clathrata; Cordosphaeridium gracile; Cordosphaeridium minimum; Corrudinium incompositum; Counting, light microscope; Cribroperidinium tenuitabulatum; Dapsilidinium pastielsii; Dapsilidinium pseudocolligerum; Dapsilidinium simplex; Deflandrea granulata; Deflandrea phosphoritica; DEPTH, sediment/rock; Dinoflagellate cyst; Dinoflagellate cyst indeterminata; Dinopterygium cladoides; Diphyes colligerum; Distatodinium ellipticum; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Enneadocysta multicornuta; Eocladopyxis tessellata; Glaphyrocysta intricata; Hemiplacophora semilunifera; Hemiplacophora sp.; Heteraulacacysta campanula; Homotryblium aculeatum; Homotryblium floripes; Homotryblium plectilum; Homotryblium tenuispinosum; Hystrichokolpoma cinctum; Hystrichokolpoma rigaudiae; Hystrichosphaeropsis sp.; Impagidinium brevisulcatum; Impagidinium cf. aculeatum; Impagidinium cf. velorum; Impagidinium dispertitum; Impagidinium maculatum; Impagidinium sp.; Impagidinium velorum; Joides Resolution; Leg171B; Lentinia serrata; Lingulodinium machaerophorum; Melitasphaeridium pseudorecurvatum; Nematosphaeropsis sp.; Ocean Drilling Program; ODP; Operculodinium spp.; Pentadinium laticinctum; Pentadinium lophophorum; Phthanoperidinium comatum; Phthanoperidinium sp.; Samlandia chlamydophora; Sample code/label; Schematophora speciosa; Spiniferites sp.; Systematophora ancyrea; Systematophora placacantha; Tectatodinium pellitum; Thalassiphora delicata; Thalassiphora pelagica; Turbiosphaera filosa; Turbiosphaera magnifica; Wetzeliella gochtii

Type: Dataset

Format: text/tab-separated-values, 1311 data points

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Mid- to Late Eocene organic-walled dinoflagellate cysts from ODP Leg 171B, offshore Florida (2001)

Van Mourik, Caroline A. ; Brinkhuis, Henk ; Williams, Graham L.

In: Geological Society Special Publication 183: 225-251.

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Publication Date: 2001-01-01

Description: The well-calibrated mid- to late Eocene sediment record of ODP Leg 171B (Site 1053A, Blake Nose) allows a detailed stratigraphic and palaeoenvironmental analysis of the dinoflagellate cyst (dinocyst) content. The recovered assemblages are a mixture of inner neritic, outer neritic and oceanic species. The autochthonous dinoflagellates, principally those of the Impagidinium group, indicate an oceanic milieu, with possibly some shallowing of water depth towards the top of the section. This trend is also indicated by a corresponding increase of inner neritic dinocysts. The close agreement in the abundance peaks of inner neritic dinocysts and terrestrial palynomorphs indicats that both are allochthonous. This is confirmed by the much higher number of neritic species found in JOIDES Holes 1 and 2, on the continental shelf of eastern Florida, immediately to the west of the Blake Nose. Lower-latitude species found in Hole 1053A, but not occurring at higher latitudes during late Eocene time, are Diphyes colligerum and Thalassiphora delicata. The presence of these, and other lower-latitude species, confirms that warmer-water conditions persisted during mid- to early late Eocene time in the vicinity of Site 1053. Eighteen new taxa are described, two of them formally: Charlesdowniea proserpina sp. nov. and Oligosphaeridium anapetum sp. nov.

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