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一地层:本区地层主要为震旦纪,寒武纪及中生代火山岩系 (1)震旦纪地层与华北一般情形相似,就笔者观察所及,是老者为高于庄灰岩层上部最新者为上震旦纪下马岭页岩层,其间岩性变化值得注意的为该区灰岩相特别发育而页岩相则不发育,此点可由杨庄红页岩与洪水庄页岩皆为灰质页岩及其厚度(前者不超过五公尺,后者不超过三公尺)甚簿可获证明,如此与华北蓟县标准区发育情形迥异,这似可作为大地槽沉积中相变之佐证。 (2)寒武纪地层该区仅有下中寒武纪,上塞武纪付缺,其中鲜有化石,仅於中寒武纪鮞状灰岩中获得翼足类化石Hyolithes数片、至於下寒武纪在该区发育情形为紫色泥质灰岩,灰青色,纷红藕荷色十分致密之灰岩,以前在泥灰岩中曾寻获下灵武纪之三叶虫,底部有棕色砂岩及鮞状灰岩一层为寒
A stratum: The strata in this area are mainly Sinian, Cambrian and Mesozoic volcanic rocks. (1) Sinian strata are similar to those in North China. As far as the author observes, the old man is taller than the upper part of the granite layer. During the Sinian Shamalian shale formation, during the lithologic changes, it is noteworthy that the limestone facies in this area are especially developed and the shale facies are not developed. This point may be characterized by that the Yangzhuang red shale and Hongshuzhuang shale are all gray shale and its Thickness (the former no more than five meters, the latter no more than three meters) even book can be proved, so with the North China Jixian standard area development situation is very different, which may serve as evidence of the geotectonic phase transition. (2) Cambrian strata This area is only of Lower-Middle Cambrian and Upper Yikesuji is absent. There are few fossils in this area, and only Hyolithes fragments are obtained in the mid-Cambrian oolite limestone. As for the Lower Cambrian In the area, the purple muddy limestone, lime-blue and limestone with rich reddish-pink lotus were developed in the area. Previously, the Lower Triassic trilobite was found in the marl and the brown sandstone and oolitic limestone at the bottom A layer of cold