1. Nitrogen biogeochemistry and ancient oceanic anoxia Open Access Author: Junium, Christopher Kendall Title: Nitrogen biogeochemistry and ancient oceanic anoxia Graduate Program: Geosciences Keywords: nitrogen cyclenitrogen isotopesblack shaleporphyrins File: Download Junium_PhD_eTD.pdf Committee Members: Michael Allan Arthur, Dissertation Advisor/Co-AdvisorMichael Allan Arthur, Committee Chair/Co-ChairKatherine Haines Freeman, Committee MemberLee Kump, Committee MemberJason Philip Kaye, Committee Member