Stratigraphic nomenclature of late quaternary pyroclastic deposits in New Zealand

Abstract

Stratigraphic nomenclature of unconsolidated pyroclastic deposits (tephra) should conform to the established procedures for other sedimentary rocks. Members should not be established before the formations of which they are part. The geographic part of new rock unit names should preferably not be that of a volcano, except in the case of deposits of historic eruptions. A formation or a member should have a designated single type section. There is no need for the introduction of the term sequence as a formal stratigraphic unit.