The Integration of Paleomagnetic, Litho-, and Bio- Stratigraphies
2009 (English)In: Eos Trans. AGU, 90(52), Suppl.,: Abstract GP22A-03, 2009Conference paper, Abstract (Other academic)
Beginning with the real-time correlation of multiple holes at a single site on ODP Leg 138, scientists have developed the capability of assuring the recovery of the complete section present at a site. Such complete recovery of relatively undisturbed (piston-cored) sections in the pelagic sediments of the tropical Pacific has led to the development of a refined paleomagnetic stratigraphy and a greatly enhanced biostratigraphy. This is particularly true for the Radiolaria. The species diversity of this group has allowed the development of over 350 paleomagnetically-controlled datums spanning 53 m.y. of the Cenozoic - over twice the number of Paleomagnetic Chron boundaries identified in the same time period. Such mutually supportive stratigraphies are allowing the development of a robust lithostratigraphy for the tropical Pacific that can be used in tuning the geologic time scale well back into the Eocene. At any given site, both the resolution and the accuracy of such an integrated stratigraphic approach is likely to remain a function of sediment accumulation rates. However, site-to-site comparisons can give insights into sediment mixing and reworking processes, the “locking in” of paleomagnetic reversals, and the presence of regional diachrony in biostratigraphic datums.
Place, publisher, year, edition, pages
, Eos Trans. AGU, 90(52), Fall Meet. Suppl.,, Abstract GP22A-03
Earth and Related Environmental Sciences
IdentifiersURN: urn:nbn:se:su:diva-34413OAI: oai:DiVA.org:su-34413DiVA: diva2:284676
AGU Fall Meeting 2009