Hughes, K. Stephen, et al. “Detrital Zircon Geochronology Across the Chopawamsic Fault, Western Piedmont of North-Central Virginia: Implications for the Main Iapetan Suture in the Southern Appalachian Orogen”. Geoscience Canada, vol. 41, no. 4, Dec. 2014, pp. 503-22, doi:10.12789/geocanj.2014.41.052.