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

最古老是一种被称为毗湿奴黑色石。

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和时温度。

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、和炭组成东部走廊里，我们没有遇到过一粒湿气。

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.

我好像是望见了萨眠图山，这山高出海面两千零七十米，是金字塔形形成山，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.

之后是麻，部分分层，因层平行性和规则性而引人注目，然后是云母，铺成大或状，通过白色闪亮云母闪光揭示了它们层状结构。