David Z. Piper

• Marine geology and oceanography of the Pacific manganese nodule province
• Chemistry of pelagic sediment and associated ferromanganese nodules, DOMES Site A, equatorial North Pacific
• Cooccurrence of Fe-, Fe-Ca-, and Ca-phosphate minerals in concretions within the Monterey Formation
• Geochemistry of minor elements in the Monterey Formation, California
• Geochemistry of the Phosphoria Formation at Montpelier Canyon, Idaho
• Historical trends of U.S. mineral statistics for gold, silver, and the rare-earth elements
• Trace-element deposition in the Cariaco Basin, Venezuela shelf, under sulfate-reducing conditions