List of Articles NB – PB Boundary surfaces Open Access Article Abstract Page Full-Text 1 - Investigating sedimentary cycles (cyclostratigraphy) and compliance with biological boundaries - Upper Eocene - Oligocene in Pabdeh formations (upper part of Pabdeh formation) and Asmari in Marun oil field. Mohammad Goodarzi Hassan Amiribakhtiar kheyrolah Nuraeinejad Mostafa Sedaqgatneia