geomantic omen

例句：

1. 1. The geomantic features of the region are fascinating to explore.
   该地区的地质特征令人着迷。
2. 2.The geomantic survey revealed a hidden cave system beneath the mountain.
   地质调查揭示了山脚下隐藏的洞穴系统。
3. 3. Geology is an important field in geomantics, studying the earth's past and present conditions.
   地质学是地理学的一个重要领域，研究地球的历史和现状。