GEOLOGIC MAP ILLUSTRATING THE STRATIGRAPHY AND STRUCTURAL GEOLOGY OF THE BORDEN SPRINGS, ALABAMA-GEORGIA 7.5-MINUTE QUADRANGLE
The Georgia-Alabama mining district, centered around Oremont, Etna, Tecumseh Furnace and Rock Run (Indian Mountain area), is similar in many ways to the Cartersville, Georgia, mining district: both are in rocks of lower Paleozoic age; iron is the dominant mineralizing ore element; major ore bodies occur in the Chilhowee and Shady in the Cartersville District, and in the Chilhowee, Shady and Newala in the Georgia-Alabama Indian Mountain area; iron deposition accompanied major silicification and brecciation in both districts.
In both Cartersville and the Indian Mountain area, major east-west compressional forces created large-scale north-south trending structures. Later north-south compression pushed metamorphic rocks northward over these earlier structures, creating east-west trending folds and faults. Contemporaneously, weakly metamorphosed lower Paleozoic rocks slid northward past schist and metagraywackes of the Blue Ridge along major oblique-slip faults in the Borden Springs area. Both north-south and east-west trending structures in the lower Paleozoic rocks are mineralized.
Geologic mapping of this quad, which began with Crawford in 1985, continues over our long-term study to more precisely defined aerial distribution of lithologic units, major geologic structures, and relationships between igneous, metamorphic, and unmetamorphosed sedimentary rocks of northwest Georgia and adjacent Alabama.