High-resolution intra- and interbasinal correlation of the Danian-Selandian transition (early Paleocene); the Bjala section (Bulgaria) and the Selandian GSSP at Zumaia (Spain)

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doi: 10.1016/j.palaeo.2010.09.004
Author(s): Dinarés-Turell, J.; Stoykova, K.; Baceta, J. I.; Ivanov, M.; Pujalte, V.
Author Affiliation(s): Primary:
Istituto Nazionale di Geofisica e Vulcanologia, Rome, Italy
Other:
Bulgarian Academy of Science, Bulgaria
University of Basque Country, Spain
University of Sofia, Bulgaria
Volume Title: Palaeogeography, Palaeoclimatology, Palaeoecology
Source: Palaeogeography, Palaeoclimatology, Palaeoecology, 297(2), p.511-533. Publisher: Elsevier, Amsterdam, Netherlands. ISSN: 0031-0182 CODEN: PPPYAB
Note: In English. 47 refs.; illus., incl. strat. cols., 5 tables, sketch map
Summary: The Danian-Selandian (D-S) boundary has been identified for the first time in the Black Sea coast at Bjala (Bulgaria) based on a new integrated bio-, magneto- and cyclostratigraphic study. Several correlation criteria as established for the basal Selandian GSSP from Zumaia (Basque Basin) are evaluated. Noteworthy, is the almost complete lack of calcareous nannoplankton species Braarudosphaera bigelowi in the Bulgarian sections, a sharp decrease of which was indicated as suitable criteria for defining the D-S boundary as it occurred both at Zumaia and in the classical locations of the North Sea basin. Conversely, the second evolutionary radiation of the calcareous nannofossil genus Fasciculithus together with the occurrence of Fasciculithus tympaniformis that define the NP4/NP5 zonal boundary seem to be reliable criteria to approximate the D-S boundary. In detail, however, the best approach is to integrate biostratigraphic data within a magnetostratigraphic and/or cyclostratigraphic framework. Refinements on the placement of chron C27n at Zumaia and robust bed-by-bed correlation between several Basque sections and Bjala indicates that the D-S boundary is located 30 precession cycles (∼630 ky) above C27n. In addition to the precession-related marl-limestone couplets and 100-ky eccentricity bundles recognized in the studied sections, expression of the stable 405-ky long eccentricity allows direct tuning to the astronomical solutions. A correlation of the land-based sections with previously tuned data from ODP Site 1262 from the Southern Atlantic is challenged. Our choice is consistent with original tuning at Zumaia but shifts one 100-ky cycle older previous tuning from Site 1262 along the interval above C27n. Under the preferred tuning scheme the D-S boundary can be given an age of 61.641±0.040 Ma on the La04 orbital solution. Abstract Copyright (2010) Elsevier, B.V.
Year of Publication: 2010
Research Program: ODP Ocean Drilling Program
Key Words: 12 Stratigraphy, Historical Geology and Paleoecology; Algae; Aquitaine Basin; Atlantic Ocean; Basins; Basque Provinces Spain; Biostratigraphy; Bjala Bulgaria; Bulgaria; Cenozoic; Climate forcing; Correlation; Cyclostratigraphy; Danian; Data integration; Europe; France; High-resolution methods; Iberian Peninsula; Leg 208; Loubieng France; Lower Paleocene; Magnetostratigraphy; Microfossils; Middle Paleocene; Nannofossils; ODP Site 1262; Ocean Drilling Program; Orbital forcing; Paleocene; Paleogene; Plantae; Selandian; South Atlantic; Southern Europe; Spain; Stratigraphic boundary; Stratotypes; Tertiary; Transition zones; Walvis Ridge; Western Europe; Zumaia Spain
Coordinates: N425200 N425200 E0275400 E0275400
N431700 N431800 W0021500 W0021600
N432500 N432600 W0004400 W0004400
S271100 S271100 E0013500 E0013400
Record ID: 2011025837
Copyright Information: GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands