The trapped particulates were mainly clay and silt in the north slope of Ilan ridge and south Okinawa trough, and were sand and silt in the Mien-Hwa canyon.

• 宜兰海脊北坡与冲绳海槽的沉降颗粒，主要是黏土与粉砂，与棉花峡谷为砂及粉砂的 组成差异甚大。