Calcareous nannofossils from Cretaceous/Paleogene boundary and earliest Danian of Santos Basin (Sao Paulo Plateau, Brazil); ODP Leg 39, Site 356, cores 28/29

Author(s): Wanderley, Maria Dolores; de Aguiar, Raquel Passeri
Author Affiliation(s): Primary:
Universidade Federal do Rio de Janeiro, Departamento de Geologia, Rio de Janeiro, Brazil
Universidade Federal Rural do Rio de Janeiro, Brazil
Volume Title: Geociencias (Sao Paulo)
Source: Geociencias (Sao Paulo), 25(4), p.389-401. Publisher: UNESP, Sao Paulo, Brazil. ISSN: 0101-9082 CODEN: GESPDU
Note: In English with Portuguese summary. 26 refs.; illus., incl. 3 tables, sketch map
Summary: Qualitative and quantitative analyses of calcareous nannofosills from Cores 28 and 29, Site 356, DSDP/ODP Leg 39, found in 18 m of nannofossil-and foraminiferal-rich calcareous mudstone, in the interval uppermost Maastrichtian and the lowermost Danian provided a continuous record of the Cretaceous/Paleogene boundary. 24 species were identified in the Maastrichtian, and 35 in the lower Danian. The following biozones were recognized: UC20 Zone, Markallus inversus Zone, Cruciplacolithus tenuis Zone, and the Chiasmolithus danicus Zone. Acme events of Thoracosphaera sp. (lowermost Danian) and Praeprinsius dimorphosus (lower Danian) were observed.
Year of Publication: 2006
Research Program: DSDP Deep Sea Drilling Project
ODP Ocean Drilling Program
Key Words: 09 Paleontology, Paleobotany; 12 Stratigraphy, Historical Geology and Paleoecology; Algae; Assemblages; Atlantic Ocean; Basins; Biostratigraphy; Biozones; Calcareous composition; Cenozoic; Chiasmolithus; Chiasmolithus danicus; Clastic rocks; Cretaceous; Cruciplacolithus; Cruciplacolithus tenuis; DSDP Site 356; Danian; Deep Sea Drilling Project; Foraminifera; Invertebrata; Leg 39; Lower Paleocene; Lower Paleogene; Markalius; Markalius inversus; Mesozoic; Microfossils; Mudstone; Nannofossils; Ocean Drilling Program; Offshore; Paleocene; Paleogene; Petroleum; Petroleum exploration; Plantae; Praeprinsius; Praeprinsius dimorphosus; Protista; Santos Basin; Sedimentary basins; Sedimentary rocks; South Atlantic; Stratigraphic boundary; Tertiary; Thoracosphaera; Upper Cretaceous
Coordinates: S281713 S281713 W0410517 W0410517
Record ID: 2008073628
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