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近年来,在华北盆地临清断块下白垩统丘城组之下,钻井揭露出一套暗色地层,主要为灰色、灰黑色泥岩、砂岩与灰色凝灰质砂岩、凝灰岩互层。横向分布较稳定,曾见于临9井、临10井、临11井和丘4井。地质矿产部第二石油普查勘探指挥部命名为“临西组”,归于晚侏罗世,与山东的蒙阴组对比。而笔者1982年以来,发现的孢粉、介形类、轮藻、腹足类等新资料,其地质时代以早白垩世为宜。
In recent years, under the Lower Cretaceous Qiucheng Formation of the Linqing fault block in the North China Basin, drilling has revealed a set of dark-colored formations, mainly gray, gray-black mudstone, sandstone and gray tuffaceous sandstone and tuff interbedded. Horizontal distribution of more stable, had seen in Pro 9 wells, Pro 10 wells, Pro 11 wells and Qiu 4 wells. Ministry of Geology and Mineral Resources Second Petroleum Survey and Exploration Command named “Pro West Group”, attributed to the Late Jurassic, compared with the Shandong Mengyin group. However, since 1982, the author found that sporopollen, ostracods, charophytes, gastropods and other new materials, the geological era of the Early Cretaceous is appropriate.