MESOAMERICAN BARRIER REEF, BELIZE PLUM ISLAND SOUND, MASSACHUSETTS NAHANT, MASSACHUSETTS NAMBIA ROATAN, HONDURAS BOGUE BANKS, NORTH CAROLINA SANTA CRUZ, CALIFORNIA SNAKE RIVER FLOOD BASALTS & CARBONATES, MELBA, IDAHO DEL PUERTO OPHIOLITE & Mg-CARBONATES, DEL PUERTO, CALIFORNIA