The oldest of these is a black rock known as Vishnu Schist.

其中最古老的被称为毗湿奴片岩的黑色岩石。

The temperature remained what it had been during our passage through the lava and schists.

温度保持在我们穿过熔岩和片岩时的温度。

In this eastern gallery made up of lavas, schists, and coal, we have not met with a single particle of moisture.

在这个由熔岩、片岩和炭组成的东部走廊里，我们没有遇到过粒湿气。

I even thought I glimpsed Mt. Sarmiento, whose elevation is 2,070 meters above sea level: a pyramid-shaped block of shale with a very sharp summit.

我好像望见了萨眠图山，这山高出海面两千零七，金字塔形的片岩形成的山，峰顶很尖。

To the schists succeeded gneiss, partially stratified, remarkable for the parallelism and regularity of its lamina, then mica schists, laid in large plates or flakes, revealing their lamellated structure by the sparkle of the white shining mica.

片岩之后片麻岩，部分分层，因其片层的平行性和规则性而引人注目，然后云母片岩，铺成大片或片状，通过白色闪亮云母的闪光揭示了它们的层状结构。