Fig. 2 in A new Late Ordovician bubble-headed trilobite species from South West Wales and its implications for biostratigraphy

Fig. 2. Stratigraphical column showing the age of the Sholeshook Limestone Formation (in blue) and the underlying and overlying formations together with the shelly and chitinozoan biozonations of the Anglo-Welsh succession. Asterisk shows approximate age of the Talfan Farm locality, in the lower part of the formation (equivalent to Cautleyan Zone 1).