Thickness, age and layers data of sediments at IODP Site U1386, U1387, and U1389

The bi-gradational sequence is recognised as a defining feature of contourite deposition. The present research questions are: In what pattern these bi-gradational sequences are...双渐变层序（bi-gradational sequence）被公认为等深流沉积（contourite deposition）的典型特征。本研究的核心问题为：此类双渐变层序的发育遵循何种模式？