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rock floor 【地質學;地理學】巖原。

rock garden

In the heart of the continent it is almost as high as the summits of the alps , yet soundings show that in places that rock floor is below sea level 大陸的中心幾乎與阿爾卑斯山等高,然而,超聲探測顯示,巖石底部的許多地點都低于海平面。

Technology of pre - stressed bolt support for rock floor gateway in deep mine complicated conditions 深井復雜條件下底板巖巷預應力錨桿支護技術

In some places the rock floor beneath the ice is 8, 000 feet below sea level . 冰層覆蓋下的巖層在有些地方為海面下八千英尺深。