This is the Sir James Mine, also known as the Sir James Pit. It is an inactive iron mine near Wawa, Ontario, Canada.

Dark brown-weathering rocks are abundant at the site. The rocks are heavy to very heavy for their size. The dominant lithologies appear to be quartzite, iron-formation, and black smoker rocks. The iron-formation rocks have siderite and hematite. Pyrite masses, pyrite veins, and disseminated pyrite are common. Much of the iron-formation is metamorphism-recrystallized siderite iron-formation. Coarsely-crystalline siderite in some samples has lustrous, almost metallic-lustered, cleavage planes. Large, weathered siderite rhombs are present. Fine-grained, brown-and-gray, banded rocks here appear to be hematite-quartz iron-formation - the brown layers streak red (= massive hematite). Paleo-seafloor black smoker structures are present at the mine - a large structure is visible on an old high wall. The black smoker rocks are black-colored, moderately friable, and partly coated with whitish powder (probably melanterite - hydrous iron sulfate). The black rocks are probably mostly pyritic wad (= manganese oxide rock). The siderite iron-formation here was deposited on the seafloor next to black smoker vents, which were the source of the siderite - this is a SEDEX deposit (= sedimentary exhalative).

Stratigraphy: Helen Iron-Formation, Michipicoten Group, Neoarchean, 2.696 to 2.749 Ga