写福鼎“内窗”论文的时候，接触到几个专业词汇：Inlier，Outlier, Window, Klippe。感谢万能的Wikipedia，帮助我理清楚了。分享给科学网的朋友。

内窗(Inlier): an area of older rocks surrounded by younger rocks. Inliers are typically formed by the erosion of overlying younger rocks to reveal a limited exposure of the older underlying rocks.

外窗(Outlier): an area of younger rock completely surrounded by older rocks. An outlier is typically formed when sufficient erosion of surrounding rocks has taken place to sever the younger rocks original continuity with a larger mass of the same younger rocks nearby.

天窗(Window): a geologic structure formed by erosion or normal faulting on a thrust system. In such a system the rock mass (hanging wall block) that has been transported by movement along the thrust is called a nappe. When erosion or normal faulting produces a hole in the nappe where the underlying autochthonous (ie un-transported) rocks crop out this is called a window.

飞来峰(Klippe): a geological feature of thrust fault terranes. The klippe is the remnant portion of a nappe after erosion has removed connecting portions of the nappe. This process results in an outlier of exotic, often nearly horizontally translated strata overlying autochthonous strata.

Inlier与Outlier相对，Window与Klippe相对。

维基还提供了一个图，区分Windwo和Klippe。