conical depression

With water logged zone of low-lying land in Xinxiang as an example, analysis is made on forming causes of water logged zone.

以新乡市饮马口低洼地形渍水区为例,分析渍水区形成的原因。

Based on the 1∶50000 Beijing—Hebei topographic map completed in 1926, a peculiar landform: dish-shaped pit groups was found in the Baiyangdian drainage area in the western part of the Hebei plain in North China.

用计算机数字地形模拟 (DTM)方法对该洼地的个体形态和总体分布特征进行研究 ,并与国内外其他地区已报道的陨石雨冲击坑对照 ,判断白洋淀流域的碟形洼地群可能是分布在第四纪松散沉积物上的陨石冲击坑的遗迹。

MINERALIZATION AT TRANSITION ROOM AND ITS SIGNIFICANCE ──Taking Uranium Ore Deposits in the Southeast China Diwa Region as Examples;

地洼区的过渡间成矿及其意义──以东南地洼区铀矿为例

There is a close relationship between occurrence of nonmetallic minerals and tectonic evolution of geosyncline,platform and diwa(geodepression)on the western margin of the Dongting diwa.

洞庭地洼西缘非金属矿产的产出特征与地槽、地台及地洼构造的演化具有密切的关系。

Based upon diwa metallogenetic theory,the division and evolution of geotectonic units in the province were studied in this paper,and there are 2Ⅰ class、3Ⅱ class、7Ⅲ class and 45Ⅳ class tectonic units in the whole province limits.

本文据地洼成矿理论，对省内大地构造单元的划分及演化进行了研究，将其划分为２个Ⅰ级、３个Ⅱ级、６个Ⅲ级、４５个Ⅳ级大地构造单元，认为中生代由于地台活化转入地洼阶段是省内大地构造演化的一大特点。