- Mr. Walter A. MastersonJr. Marine Development TechnicianLamont-Doherty Earth ObservatoryMarine Geology and Geophysics101 Borehole61 Route 9W - PO Box 1000PalisadesNY10964-8000USPhone:(845) 365-8610Fax:(845) 365-3182wmasters@ldeo.columbia.edu

