Figure 4

Examples of extensively coated bedrock surfaces near the Horne smelter: (A) glacially smoothed and striated igneous units of mafic to intermediate composition, Rouyn-Pelletier formation (Blake River Group) and associated intrusions; (B) various intrusive and extrusive igneous units of felsic to intermediate composition; (C) rhyolite of the Noranda formation (Blake River Group); (D–F) basaltic and andesitic lava flows of the Rouyn-Pelletier formation; (G,H) Quémont and Joliet rhyolites (Blake River Group). Rock hammer for scale. Site locations are given in Fig. 2.