Explanatory Notes

Abstract

Appendix (Shipboard Scientific Party) Following the text of each site chapter are summary downhole logs. Core descriptions ("barrel sheets" and igneous rock visual core descriptions) and photographs of each core appear in Section 3, near the back of this volume. DEFINITIONS Conventional Use of Time and Time-Rock UnitsThe subdivisions of epochs/series into early, middle, late, or lower, middle, upper have no real formal standing in stratigraphy. The subdivision of lithostratigraphic (rock), chronostratigraphic (time-rock), and geochronologic (time) units is defined as follows throughout this volume. Lithostratigraphic UnitsFor rock units, the terms lower, middle, and upper describe sections of rocks subdivided on the basis of superposition, without any implication of time-partitioning.