唐王岭位于陕西省礼泉县,耸立于渭河平原之北(图版Ⅰ-1)。其主峰为一套砾岩。1965年,黄河水利委员会地质物探队认为,唐王岭砾岩具“似冰碛层性质”,时代暂定为震旦纪。1970年,陕西省地质局第十三地质队认为唐王岭砾岩为“一套滨海相陆源碎屑建造”,划归下奥陶统。1972年,陕西省地质局第八地质队将其划为中、下奥陶统。1974 Tang Wang Ling is located in Liquan County, Shaanxi Province, stands in the Weihe Plain North (Plate Ⅰ-1). Its main peak is a conglomerate. In 1965, the Geophysical Team of the Yellow River Conservancy Commission believed that the Tangwangling conglomerate has a “moraine-like layer” and the epoch was tentatively Sinian. In 1970, the thirteenth geological team of Shaanxi Provincial Bureau of Geology identified the Tangwangling conglomerate as “a set of marine debris from the coastal phase” and was placed under the Ordovician. In 1972, the eighth geological team of Shaanxi Provincial Geological Bureau classified it as Middle and Lower Ordovician. 1974