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1 油苗的产状及特征 雨淋山油苗点位于京山县城北约4km,京山县城至厂河镇公路西侧的采石场。野外初步观察该点产于京山县城北面一系列北倾迭瓦状逆冲断层带最前沿,张脑山倒转向斜的东北翼。 油苗出露层位为中奥陶统牯牛潭组—宝塔组、出露地层厚度约50m。岩性为中厚层状深灰色、灰色,含泥质生物灰岩,含生物泥灰岩,间夹瘤状泥灰岩、泥质条带灰岩;上部具龟裂纹含泥质生物灰岩。地层产状为215°∠60°。该套岩层晶洞发育,沿裂缝呈串珠状或蜂窝状分布。自油苗点沿倒转背斜北翼向北西西方向追索约300m,出现溶洞群,共七个,有的相互串通,当地称为“白谷洞”。
The appearance and characteristics of an oil seedling Youling Shan Miao Miao point is located in Jingshan County, about 4km north of Jingshan County to the factory town of the west side of the quarry. Preliminary observations in the wild The site is located in the north of Jingshan County, a series of North Tectonic Triassic thrust belt forefront, Zhang Nanshan inverted syncline northeast wing. The outcrops of the oil sands are the Middle Ordovician 牯 Nintan Formation - Pagoda Formation, exposing the formation thickness of about 50m. Lithology is medium-thick layered dark gray, gray, muddy biological limestone, containing biological marl, intercropper tumor marl, argillaceous limestone; the upper turtle cracked mud-containing bio-gray rock. Formation of the formation of 215 ° ∠ 60 °. The rock strata are well developed with beaded or honeycombed distribution along the fracture. From the point of oil-fringing point, the north wing of the anticlinal anticline has been traced back to about 300m to the northwest-west direction. There are seven cave groups, some of which are in collusion with each other and are called “Bai Gu Dong” locally.