Porosity and sound velocity measured in sediment core CIROS-1

The CIROS-1 drillhole, which in 1986 reached a depth of 700 m below the seafloor, is still the only deep hole that can provide information on the velocity structure of the upper...CIROS-1钻孔（CIROS-1 drillhole）于1986年达到海底以下700米的钻探深度，时至今日，它仍是唯一可提供上部……速度结构相关信息的深海钻孔。