Tertiary sea level symposium—Introduction
Abstract Eleven papers making up the Tertiary Sea Level Symposium (spring 1967) are presented herewith. Their combined effect is to produce a “first approximation”, Tertiary history of sea level involving a more-or-less steady drop, of 70–100 m, beginning about the middle of Miocene time. This history requires a careful reconsideration of identifications of high marine terraces as having been formed in the Quaternary Period. The concept of possible glacio-eustatic oscillations, in the Tertiary, is explored in one paper. Data from Antarctica and the surrounding ocean show that a major influence on Miocene and later sea levels was the advent of extensive glaciation.