<p>Two blooms of iron of around 4&#xa0;kg were made from black sand collected from the south shore of Lake Superior near White Fish Point. Both blooms, called bloom 1 and 2 here, were sectioned, and the distribution of C was determined using metallographic analyses on the polished and etched faces of the sections. The iron of the blooms contained three microconstituents: ferrite, pearlite, and cementite. The area fractions of the three were determined using image analyzing software, and the %C was calculated assuming equal volume and area fractions. Both blooms displayed a non-uniform distribution of carbon. The bulk of both blooms had carbon levels below 0.1 %C. Both blooms contained small regions of increased carbon, including pools at cast iron levels of above 2.1% C. The regions of increased carbon in both were concentrated along the top and outside edges of the bloom, mostly in the half of the bloom located at the far end from the tuyere. The average %C in bloom 2 was higher than in bloom 1. Chemical analyses for both C and other elements in the two blooms, as well as in three previous blooms made under similar smelter operating conditions, were made. These data on %C distribution are consistent with those found using the image analyzing technique. Hypotheses are presented to explain the skewed carbon distribution and the higher carbon in bloom 2. An unexpected result found that 4 of the 5 blooms contained Ti in the iron, while the 5th did not. These results indicate that the source rock of some of the black sand in Lake Superior near White Fish Point must be a deposit other than BIF iron because iron from BIF deposits would not be expected to contain Ti. Small pieces of the tapped slag of bloom 2 and from the bottom of the bloom were examined in the SEM using backscatter imaging and EDS analysis. The previous studies of low bloomery slags found them to contain four microconstituents: iron particles, wustite, fayalite, and glass. In the slags found here, the fayalite constituent was replaced by a constituent high in Fe and Ti. The composition of this constituent is close to that of the mineral ulvöspinel (Fe₂TiO₄). It is concluded that the source rock of some of the Lake Superior black sand must be one of the common Fe–Ti minerals.</p>