豫西登封地区寒武系第二统朱砂洞组古气候演变记录*
樊钰超, 齐永安, 代明月, 庆国帅, 刘炳辰, 白万备

Paleoclimate evolution recorded in the Cambrian Epoch 2 Zhushadong Formation from Dengfeng area, western Henan Province
Fan Yu-Chao, Qi Yong-An, Dai Ming-Yue, Qing Guo-Shuai, Liu Bing-Chen, Bai Wan-Bei
河南登封关口剖面寒武系第二统朱砂洞组岩性特征 A—纹层状白云岩,朱砂洞组下部(第2层),发育纹层;B—纹层状白云岩,朱砂洞组下部(第2层),可见石膏,单偏光;C—豹斑灰岩,朱砂洞组上部(第5层);D—豹斑灰岩,朱砂洞组上部(第5层),发育 Thalassinoides ;E—纹层状白云岩,朱砂洞组上部(第12层),局部富集燧石团块;F—纹层状白云岩,朱砂洞组上部(第12层),可见石膏,单偏光