Fig. 1. A in Trilobites from the latest Frasnian Kellwasser Crisis in North Africa (Mrirt, central Moroccan Meseta)

Fig. 1. A. Devonian outcrops in Morocco with location of the Mrirt area in the central Meseta east of Rabat. B. Measured section "1" showing the Lower (LKW) and Upper (UKW) Kellwasser horizons and the intervening limestone beds. The levels of the lower and upper trilobite associations are marked with a star. C. Location of the studied sections "1" and "2" at Bou Ounabdou, 4 km to the SE of Mrirt township (after Becker and House 1999 and Walliser et al. 1999). Section "1" is the same as Bou Ounabdou, section II of Lasreq (1992).