Between a rock and a soft place: Using optical ages to date ancient clam gardens on the Pacific Northwest Neudorf, Christina M. ; Smith, Nicole ; Lepofsky, Dana ; Toniello, Ginevra ; Lian, Olav B. Abstract Publication: PLoS ONE Pub Date: February 2017 DOI: 10.1371/journal.pone.0171775 Bibcode: 2017PLoSO..1271775N