rhabdolith

例句：

1. 1.The rhabdoliths are visible from the observation deck.
   从观景台上可以看到这些石笋。
2. 2. The geologist found a new type of rhabdolith in the cave.
   地质学家在洞穴里发现了一种新的石笋。
3. 3. The rhabdoliths were formed by the gradual accumulation of minerals over millions of years.
   这些石笋是由数百万年矿物质逐渐积累形成的。