Fig. 2. Minerals present on the surface of a Fe⁰ filing from the shallow portion of Core 2 at 5.5 to 5.8 m collected after 30 mo of operation: (a) scanning electron microscopy (SEM) photomicrograph showing hexagonal-shaped goethite crystals and elongated aragonite crystals, (b) energy dispersive X-ray (EDX) analysis of the goethite from (a); (c) EDX analysis of the aragonite from (a); (d) SEM photomicrograph showing the distribution of rounded formations of FeS in relation to the goethite and aragonite shown in (a); and (e) EDX analysis of the FeS from (d). Arrows indicate the location of the EDX analysis areas.