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在深入研究滦平盆地大店子组叶肢介化石时,于该组上部首次发现了网雕饰叶肢介Clithrograpta属,产出层数多,个体数量大,种的分异度高,为冀北滦平盆地大店子组的地层划分与对比,正确建立冀北—辽西陆相侏罗—白垩系的地层格架,提供了关键而有力的古生物证据。根据这一发现和大北沟组至西瓜园组叶肢介化石组合序列,本区大店子组上部(3～4段)可与辽西建昌盆地“义县组”下部(原大新房子组)对比;证明辽西地区缺失相当于本区的大店子组下部(1～2段)地层,西瓜园组大体相当于辽西的义县组。
In the depth study of Luanping basin Dadianzi fossil amphiprion, the first group found in the upper part of the group of Clothrothraceae Clithrograpta genera, output layer number, the number of individuals, the species of high differentiation, for the Hebei The stratigraphic division and contrast of the Dadianzi Formation in the North Luanping Basin and the establishment of the stratigraphic framework of the continental Jurassic-Cretaceous in the north Hebei-Liaoxi area provide a key and potent paleontological evidence. Based on this discovery and the combination of the exometalian fossils from the Dabeigou Formation to the Watermelon Garden Group, the upper part of the Dadianbu Formation in the area (3-4) can be connected with the lower part of the “Yi County Formation” in the Jianchang Basin in western Liaoning Group). It is proved that the western Liaohe area is equivalent to the lower part of Dadaodian Formation (1-2 st) strata in this area, and the watermelon garden group is roughly equivalent to the Yixian Formation in western Liaoning.