Belemnite geochemistry from Albstadt-Pfeffingen (Middle Jurassic, Baden-Württemberg, Germany)

Abstract

Belemnite calcite is an important source of stable isotope (18O, 13C) and element (Fe, Mg, Mn, S, Sr) proxies with potential for high-resolution quantitative reconstructions of palaeoenvironments and seasonality since Urey et al (1951). Belemnites are also a very important archive for environmental reconstructions of the early Toarcian; it is important, however, to study their calcite over intervals of comparative environmental stability to assess the meaning of proxy data extracted from their calcite. Here, we report on recent developments on geochemical proxies derived from belemnite rostra from Albstadt-Pfeffingen, a potential GSSP for the base of the Callovian, in Baden-Württemberg.