NWNicholas WarnerFollowUsage metrics Co-workers & collaboratorsJGJohn GrantJohn GrantCWCatherine WeitzCatherine WeitzSPSharon PurdyResearch GeologistSharon PurdyMGMatthew GolombekMatthew GolombekATAllyson TrussellAllyson TrussellNWNathan WilliamsNathan Williams