What is now South Beloit was previously full of natural resources such as copper, lead, and bog iron. Buff and blue limestones were plentiful everywhere in Winnebago County, with limestone forming the banks of the Rock River and Turtle Creek. The buff limestone gave the first settlers material for their houses and public buildings, some of which can still be seen in Rockford, Rockton, and Beloit/South Beloit. The older homes in South Beloit had basement walls of this limestone. The South Beloit area has a thick deposit of sand, and industries were built here because of its unusually fine quality. A fine quality of clay was also found in the state line area.
What is now South Beloit was previously full of natural resources such as copper lead and bog iron Buff and blue limestones were plentiful everywhere in Winnebago County with limestone forming the banks of the Rock River and Turtle Creek The buff limestone gave the first settlers material for their houses and public buildings some of which can still be seen in Rockford Rockton and Beloit/South Beloit The older homes in South Beloit had basement walls of this limestone The South Beloit area has a thick deposit of sand and industries were built here because of its unusually fine quality A fine quality of clay was also found in the state line area