BIPUNCTOPRIMITIA, A NEW NAME FOR THE OSTRACODE GENUS PARAPRIMITIA GAILITE, 1967; p. 173

Gailite†, L-I

doi:10.3176/geol.1991.4.06

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“…and distinctive shelly and microfaunal assemblages (see also Gailite et al 1987). For example, those of the ostracodes Plicibeyrichia numerosa-Undulirete baltica (Sarv 1982;Gailite 1986); the thelodont Thelodus sculptilis (Märss 1997); the conodont Ozarkodina crispa (Brazauskas 1993;Viira 1999); and the chitinozoan Eisenackitina barrandei (Nestor 2009). This interval has not attracted much attention in chemostratigraphy, although its position just above the mid-Ludfordian excursion is well defined.…”

Section: The Ludlow Carbon Isotope Trend Above the Mid-ludfordian Exc...mentioning

confidence: 99%

Přídolí carbon isotope trend and upper Silurian to lowermost Devonian chemostratigraphy based on sections in Podolia (Ukraine) and the East Baltic area

Kaljo¹,

Martma²,

Grytsenko³

et al. 2012

Estonian J. Earth Sci.

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Insufficient knowledge of carbon isotope cycling in the latest Silurian initiated the study of two regions at the western and southwestern margins of Baltica in order to obtain a more complete picture about the carbon isotope trend through the Přídolí. Shallow and open shelf carbonate rocks of the Dniester River outcrops and Kotuzhiny core in Podolia and deep shelf rocks of the East Baltic area, especially the Lithuanian cores, were studied for bulk-rock isotope analysis. The data sets of both regions begin with the mid-Ludfordian excursion and include also some part of the lowermost Devonian. The data show a new minor twin positive δ13C excursion (peak values 0.8–1.7‰) in the upper Ludfordian. The Přídolí carbon isotope trend begins with a low of negative δ13C values, succeeded by the lower to middle Přídolí ‘stability’ interval (variable values below or close to 0‰ with a slight rising trend). The upper Přídolí begins with a medium to major excursion (peak values 2.3–4.5‰), which reflects the pattern of the carbon isotope trend on the west of the Baltica palaeocontinent. Its wider significance awaits confirmation from observations elsewhere. The carbon isotope excursion at the Silurian–Devonian boundary, named here the SIDE excursion (its δ13C values range from 1.6‰ in deep shelf settings to 3.8‰ in shallower ones and 4.5‰ in brachiopod shells), has been traced on several continents, and now also in Baltica. This excursion can serve as a well-dated global chemostratigraphic correlation tool. The shape of the excursion indicates the completeness of the studied section. We conclude that carbon isotope chemostratigraphy may contribute to subdividing the Přídolí Series into stages and that Baltica sensu lato seems to be the right place for such a development

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Section: The Ludlow Carbon Isotope Trend Above the Mid-ludfordian Exc...mentioning

confidence: 99%

Přídolí carbon isotope trend and upper Silurian to lowermost Devonian chemostratigraphy based on sections in Podolia (Ukraine) and the East Baltic area

Kaljo¹,

Martma²,

Grytsenko³

et al. 2012

Estonian J. Earth Sci.

View full text Add to dashboard Cite

show abstract

BIPUNCTOPRIMITIA, A NEW NAME FOR THE OSTRACODE GENUS PARAPRIMITIA GAILITE, 1967; p. 173

Cited by 1 publication

References 0 publications

Přídolí carbon isotope trend and upper Silurian to lowermost Devonian chemostratigraphy based on sections in Podolia (Ukraine) and the East Baltic area

Přídolí carbon isotope trend and upper Silurian to lowermost Devonian chemostratigraphy based on sections in Podolia (Ukraine) and the East Baltic area

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