Schist
片岩
Schist is a metamorphic rock form characterized by strong foliation so that it is readily split into thin flakes or slabs.
片岩是一种变质岩，其特征是具有强烈的片理构造，使其易于分裂成薄片或板状。
rock 变质岩 | 纹理 | rock 母岩 | 描述 |
| Schist
片岩 | Foliated
层状的 | Shale, granitic and volcanic rocks
页岩、花岗岩和火山岩 | Coarse-grained micaceous minerals
粗粒度的黏土矿物 |
This example of schist is from Warm Springs, Georgia where a stressed formation produces it along with quartzite and gneiss, two other metamorphic rocks. The formation produces a large warm spring.
这种片岩来自佐治亚州温泉镇，该地区应力作用形成了这种岩石，同时还有石英岩和片麻岩两种变质岩。该地区形成了大量的温泉。
The lowest group in the Grand Canyon is referred to as Vishnu Schist The projected age for these rocks is about 1750-1840 Myr.
| Examples of metamorphic rock
变质岩的例子 |
大峡谷中最底层的岩层称为 Vishnu 片岩，这些岩石的估计年龄约为 1750 至 1840 百万年。
Reference
Lutgens and Tarbuck
Ch 7
索引 参考 Lutgens 和 Tarbuck 第7章
| HyperPhysics*****Geophysics
HyperPhysics ***** 地球物理学 | R Nave |
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