Supporting Information for 'Pleistocene smoothing and resurfacing of Appalachian ridgelines by periglaciation"

Data Set S1: Basin locations and statistics, including erosion rate and basin slope, used in Figure 3 from Portenga et al. 2013 and Portenga et al, 2019. Data Set S2: Lines of cross-section used to calculate interlimb angle from published maps. Citations for each map are included. Data Set S3: Ridgeline locations and statistics, including hilltop curvature and erosion rate, used in Figure 3 from Portenga et al. 2013 and Portenga et al, 2019. Data Set S4: Strikes and dips used to compute interlimb angles for Tuscarora plunging anticlines. Citations for each map or digital dataset are included. Data Set S5: Thickness of Tuscarora sandstone from published maps of 1:24,000 and 1:100,000 mapping quadrangles by name. Citations for each map are included. Data Set S6: LGM and modern mean annual minimum temperature and mean annual precipitation for each morphometric tile location, as gridded by Lorenz et al. 2016 and PRISM, respectively. Data Set S7: Compiled morphometric, climate, and geologic attributes of each morphometric tile. Morphometries are median values for all Tuscarora datapoints; climate data and geologic data cover the entire area of the tile. Lorenz, D.J., Nieto-Lugilde, D., Blois, J.L., Fitzpatrick, M.C., and Williams, J.W., 2016, Downscaled and debiased climate simulations for North America from 21,000 years ago to 2100AD: Scientific Data, v. 3, p. 1–19, doi:10.1038/sdata.2016.48. Portenga, E.W., Bierman, P.R., Rizzo, D.M., and Rood, D.H., 2013, Low rates of bedrock outcrop erosion in the central Appalachian Mountains inferred from in situ 10Be: Geological Society of America Bulletin, v. 125, p. 201–215, doi:10.1130/B30559.1. Portenga, E.W., Bierman, P.R., Trodick, C.D., Greene, S.E., DeJong, B.D., Rood, D.H., and Pavich, M.J., 2019, Erosion rates and sediment flux within the Potomac River basin quantified over millennial timescales using beryllium isotopes: Bulletin of the Geological Society of America, v. 131, p. 1295–1311, doi:10.1130/B31840.1.