River alluvium is deposited here and there along the St. Louis River. At Cloquet the river passes through a rather extensive flood plain of flat on which saw mills are located. Before the lumber yards became so extensive as to occupy most of the flat, a small brick yard produced some red, soft-mud brick, which were of fair quality, if one can judge from the buildings still standing at Cloquet. On the northeast side of the river a considerable portion of the flat is still unoccupied and was sampled to determine the quality of the silt of St. Louis River. It should be capable of burning to an excellent hard red brick, and the refuse from the saw mills should make the fuel problem an easy one. (Clays and Shales of Minnesota, Frank F. Grout and E. K. Soper, The University of Minnesota, Minneapolis, Minnesota, 1914, Page 84)