1)  travertine
泉钙华
1.
The major evolution stages of the Niangziguan karst springs since Middle Pleistocene Epoch are identified according to our study on the travertines accumulated in the discharge areas of the springs, and by applying groundwater flow system theories the temporal spatial evolution of the springs is reconstructed, which includes four major stages: (1) Q 2.
从研究娘子关泉群出露区堆积的不同时期泉钙华入手，对泉群自中更新世以来的发育阶段进行了划分，在此基础上，运用地下水流动系统理论分析了泉群的时空演化过程。
补充资料：硼钙石,水化硼酸钙,硬硼钙石
CAS：12007-56-6
分子式：B4CaO7
中文名称：四硼酸钙；硼酸钙；硼钙石,水化硼酸钙,硬硼钙石
英文名称：Boron calcium oxide；Calcium borate；boric acid (h2-b4-o7), calcium salt ；boron calcium oxide (b4cao7)；calcium tetraborate；colemanite
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