Occurrence of hiatuses PH and NH 1 through NH 7 in DSDP holes

Miocene paleoceanographic evolution exhibits major changes resulting from the opening and closing of passages, the subsequent changes in oceanic circulation, and development of...中新世（Miocene）古海洋演化呈现出一系列重大变革，这些变革由水道的开启与闭合、后续大洋环流变化，以及……的发展所引发。