Figure 4
From: Exceptional sulfur and iron isotope enrichment in millimetre-sized, early Palaeozoic animal burrows
This subregion, marked with a black box in Fig. 3, has been selected for X-radiography. This higher-resolution scan reveals a three-dimensional framework of tubular pyritic structures (TPS—yellow arrows) as well as meandering, curved and zigzagging pyritic trails (PTs—red arrows) (see text for discussion).
