PANGAEA_783924 (Table 1) Silicoflagellate abundance in ODP Hole 186-1149A sediments Lozar, Francesca; Mussa, Massimo (Table 1) Silicoflagellate abundance in ODP Hole 186-1149A sediments 2003 PANGAEA Dataset Supplement to: Lozar, Francesca; Mussa, Massimo (2003): Silicoflagellate biostratigraphy, Hole 1149A (ODP Leg 185, Nadezhda Basin, northwestern Pacific). In: Ludden, JN; Plank, T; Escutia, C (eds.) Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 185, 1-18, https://doi.org/10.2973/odp.proc.sr.185.009.2003 https://doi.pangaea.de/10.1594/PANGAEA.783924 Investigator Francesca Lozar Earth Science Sample code/label DEPTH, sediment/rock Organic matter Biogenic Volcanic glass Corbisema triacantha Dictyocha aculeata aculeata Dictyocha aculeata subaculeata Dictyocha aspera aspera Dictyocha brevispina ausonia Dictyocha brevispina brevispina Dictyocha calida ampliata Dictyocha calida calida Dictyocha fibula Dictyocha lingii Dictyocha longa Dictyocha pentagona Dictyocha perlaevis delicata Dictyocha perlaevis flexatella Dictyocha perlaevis ornata Dictyocha perlaevis perlaevis Dictyocha pulchella Dictyocha stapedia aspinosa Dictyocha stapedia stapedia Distephanus boliviensis Distephanus crux Distephanus octangulatus Distephanus speculum minutus Distephanus speculum pentagonus Distephanus speculum speculum Mesocena circulus Mesocena elliptica Mesocena quadrangula Silicoflagellates, aberrant geoscientificInformation 185-1149A Drilling/drill rig Leg185 DSDP/ODP/IODP sample designation Abundance estimate, Baccelle and Bosellini (1965) Joides Resolution 1999-05-23 1999-05-26 Complete 31.342 31.342 143.3513 143.3513 1.12 m (DEPTH, sediment/rock) 98.6 m (DEPTH, sediment/rock) ODP Ocean Drilling Program unrestricted CC-BY-3.0: Creative Commons Attribution 3.0 Unported English PANGAEA Data Publisher for Earth & Environmental Science https://www.pangaea.de/ Data Center Contact Michael Diepenbroek info@pangaea.de

Leobener Str.

Bremen Bremen 28359 Germany online 1419 data points text/tab-separated-values Baccelle, Lucia; Bosellini, Alfonso (1965): Diagrammi per la stima visiva della composizione percentuale nelle rocce sedimentarie. Università degli studi di Ferrara, Annali. Nuova ser. Sez. IX: Scienze geologiche e paleontologiche, 59-62

Silicoflagellate assemblages have been studied from Hole 1149A (northwestern Pacific, Ocean Drilling Program Leg 185) in a continuous record of pelagic clay from lithologic Unit I. The biostratigraphic framework of D. Bukry, adapted in this work, is calibrated to tropical and subtropical fossil floras. Four biozones and three subzones have been recognized (from the lower Pliocene Dictyocha fibula Zone to the Quaternary Dictyocha aculeata aculeata Zone), and their zonal boundaries have been calibrated to the magnetostratigraphic scale. In particular, the boundary between the Dictyocha perlaevis delicata and the Dictyocha perlaevis ornata Subzones approximates the Pliocene/Pleistocene boundary. The identification of three closely spaced climatic events (the asperoid/fibuloid reversal at 75.11 meters below seafloor [mbsf], the sharp decrease in abundance of Distephanus sp. at 70.05 mbsf, and the last occurrence of Distephanus boliviensis at 68.46 mbsf) indicates the increased strength of the warm Kuroshio Current in the interval between 3.3 and 2.8 Ma, due to the final closure of the Central American Seaway and leading to the present-day hydrodynamic regime. The beginning of the acme of Mesocena quadrangula at 37.01 mbsf (~1.1 Ma) also shows a sharp warming in surface waters. ** For all details see the full metadata description at "https://doi.pangaea.de/10.1594/PANGAEA.783924"! ** Sediment depth is given in mbsf. Sample observation was performed under a polarizing light microscope at 400x magnification. Abundance estimate as follows: A = abundant, C = common, F = few, R = rare, VR = very rare, - not found.

http://www.marinespecies.org/aphia.php?p=taxdetails&id=157463 Dictyocha fibula https://doi.org/10.2973/odp.proc.sr.185.009.2003 Silicoflagellate biostratigraphy, Hole 1149A (ODP Leg 185, Nadezhda Basin, northwestern Pacific) https://hdl.handle.net/10013/epic.27914.d001 DSDP/ODP/IODP sample designation https://www-odp.tamu.edu:443/ ODP https://www-odp.tamu.edu:443/resolutn.html Joides Resolution DIF 9.4 2026-05-01