Testing the limits of Paleozoic chronostratigraphic correlation via high-resolution (<500 kyr) integrated conodont, graptolite, and carbon isotope (d13C-carb) biochemostratigraphy across the Llandovery-Wenlock (Silurian) boundary: Is a unified Phanerozoic timescale achievable?

Journal article
(Original article)


Publication Details

Author(s): Cramer BD, Loydell DK, Samtleben C, Munnecke A, Kaljo D, Maennik P, Martma T, Jeppsson L, Kleffner MA, Barrick JE, Johnson CA, Emsbo P, Joachimski M, Bickert T, Saltzman MR
Journal: Geological Society of America Bulletin
Publisher: Geological Society of America
Publication year: 2010
Volume: 122
Pages range: 1700-1716
ISSN: 0016-7606
Language: English


Abstract


The resolution and fidelity of global chronostratigraphic correlation are direct functions of the time period under consideration. By virtue of deep-ocean cores and astrochronology, the Cenozoic and Mesozoic time scales carry error bars of a few thousand years (k.y.) to a few hundred k.y. In contrast, most of the Paleozoic time scale carries error bars of plus or minus a few million years (m.y.), and chronostratigraphic control better than ±1 m.y. is considered “high resolution.” The general lack of Paleozoic abyssal sediments and paucity of orbitally tuned Paleozoic data series combined with the relative incompleteness of the Paleozoic stratigraphic record have proven historically to be such an obstacle to intercontinental chronostratigraphic correlation that resolving the Paleozoic time scale to the level achieved during the Mesozoic and Cenozoic was viewed as impractical, impossible, or both.



Here, we utilize integrated graptolite, conodont, and carbonate carbon isotope (δ13Ccarb) data from three paleocontinents (Baltica, Avalonia, and Laurentia) to demonstrate chronostratigraphic control for upper Llandovery through middle Wenlock (Telychian–Sheinwoodian, ∼436–426 Ma) strata with a resolution of a few hundred k.y. The interval surrounding the base of the Wenlock Series can now be correlated globally with precision approaching 100 k.y., but some intervals (e.g., uppermost Telychian and upper Sheinwoodian) are either yet to be studied in sufficient detail or do not show sufficient biologic speciation and/or extinction or carbon isotopic features to delineate such small time slices. Although producing such resolution during the Paleozoic presents an array of challenges unique to the era, we have begun to demonstrate that erecting a Paleozoic time scale comparable to that of younger eras is achievable.



FAU Authors / FAU Editors

Joachimski, Michael Prof. Dr.
Lehrstuhl für Geologie (Exogene Dynamik)
Munnecke, Axel Prof. Dr.
Professur für Paläontologie (Schwerpunkt Faziesanalyse)


External institutions
Christian-Albrechts-Universität zu Kiel
Lund University / Lunds universitet
Ohio State University
Tallinn University of Technology
Texas Tech University (TTU)
United States Geological Survey
Universität Bremen
University of Portsmouth


How to cite

APA:
Cramer, B.D., Loydell, D.K., Samtleben, C., Munnecke, A., Kaljo, D., Maennik, P.,... Saltzman, M.R. (2010). Testing the limits of Paleozoic chronostratigraphic correlation via high-resolution (<500 kyr) integrated conodont, graptolite, and carbon isotope (d13C-carb) biochemostratigraphy across the Llandovery-Wenlock (Silurian) boundary: Is a unified Phanerozoic timescale achievable? Geological Society of America Bulletin, 122, 1700-1716. https://dx.doi.org/10.1130/B26602.1

MLA:
Cramer, Bradley D., et al. "Testing the limits of Paleozoic chronostratigraphic correlation via high-resolution (<500 kyr) integrated conodont, graptolite, and carbon isotope (d13C-carb) biochemostratigraphy across the Llandovery-Wenlock (Silurian) boundary: Is a unified Phanerozoic timescale achievable?" Geological Society of America Bulletin 122 (2010): 1700-1716.

BibTeX: 

Last updated on 2018-09-08 at 14:53