The New International Encyclopædia/Burlington Limestone

BURLINGTON LIMESTONE. A limestone of Carboniferous age, and a valuable material for building, found in abundance near Burlington, Iowa, and elsewhere in the Mississippi Valley. It is divisible into two members, the upper one being nearly pure carbonate of lime, the lower one containing magnesia. This formation is peculiar for the abundance of fossils found in it, especially of Crinoidea and corals.