Carnian (Late Triassic) charophyte flora of the Paleorhinus biochron at Krasiejów
by Michal Zaton, Sosnowiec & Agnieszka Piechota, Sosnowiec
ZATON, M. & PIECHOTA, A. (2003): Carnian (Late Triassic) charophyte flora of the Paleorhinus biochron at Krasiejów (SW Poland). Freiberger Forschungshefte C 499: Paläontologie, Stratigraphie, Fazies (11): 43-51; Freiberg.
Sediments from around the bone-bearing horizon of Late Carnian age at Krasiejów, south-western Poland, include an abundant charophyte flora preserved as calcitized oospores (gyrogonites). The assemblage consists of four organ-species: Stellatochara germanica KOZUR & REINHARDT, Stomochara starozhilovae (KISIELEVSKY), Porochara triassica (SAIDAKOVSKY) and variable morphologically Stenochara kisielevkyi BILAN. The most abundant assemblage lived during sedimentation of the bone-bearing bed. Higher in the succession, charophyte numbers dropped drastically due to environmental change to more saline or more turbulent conditions. The preliminary geochemical analysis has shown that an increase in salinity might have been the main limiting factor of charophyte growth.