The pluton has been determined by Rb/Sr isotope dating to be 326 +/- 27 million years old, indicating emplacement during the Pennsylvanian-Permian. A contact aureole composed mainly of mica schist and mica gneiss surrounds the body of granite, and the granite is intruded by the Pee Dee gabbro, which grades outward into diorite.Butler, J. R., & Ragland, P. C. (1969). A petrochemical survey of plutonic intrusions in the Piedmont, Southeastern Appalachians, U.S.A. Contributions to Mineralogy and Petrology, 24(2), 164–190. doi:10.1007/bf00376889. https://link.springer.com/article/10.1007/BF00376889
