1. A record of coupled hlllslope and channel response to Pleistocene periglacial erosion in a sandstone headwater valley, central Pennsylvania Open Access Author: Del Vecchio, Joanmarie Title: A record of coupled hlllslope and channel response to Pleistocene periglacial erosion in a sandstone headwater valley, central Pennsylvania Graduate Program: Geosciences Keywords: geomorphologyperiglacialcosmogenic nuclidespaleoclimatecritical zone File: Download Del_Vecchio_MS_thesis_final_August_v2.pdf Committee Members: Roman A. DiBiase, Thesis Advisor/Co-AdvisorSusan L. Brantley, Committee MemberLi Li, Committee Member