Fig. 1. A in Nanostructural and geochemical features of the Jurassic isocrinid columnal ossicles

Fig. 1. A. Simplified map of Poland with position of investigated Gnaszyn locality. B. Enlargement of Gnaszyn area with a clay pit from which crinoid samples were collected (modified after Zatoń et al. 2006). C. Stratigraphic column of the Bathonian deposits at Gnaszyn clay pit (modified after Majewski 2000).