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(一)吴家坪组分布概况就现有资料而言,云南省西北部晚二叠世吴家坪期地层的分布范围,只限于丽江以北,即拖甸-长松坪断裂至玉龙雪山东坡一线以西,中甸以东。(图1) 《西南地区区域地层表》(云南省分册)建立了本区吴家坪组。其代表剖面有:(1)丽江雪松植物园剖面。岩性为一套灰白色灰岩,下部夹大理岩和玄武岩。主要产腕足类化石,其中的Transennatia(=Dictyoclostus)gratiosus(Waagen),Waagenites soochowensis(Chao)等多为各地龙潭期常见分子;(2)中甸溜马槽及铁厂附近剖面。其岩性为一套大
(1) Distribution of Wujiaping Formation In terms of available information, the distribution of the Late Permian Wujiaping Period strata in the northwestern Yunnan Province is limited to the area north of Lijiang, ie, from the Yaodian-Changsongping fault to the first line of the east slope of the Yulong Snow Mountain East of Zhongdian. (Figure 1) “Southwest Territorial Stratigraphy Table” (Yunnan Province Branch) established Wujiaping group in this area. The representative sections are: (1) Lijiang Cedar Botanical Garden section. Lithology is a set of gray limestone, the lower folder of marble and basalt. The main brachiopod fossils, Transennatia (= Dictyoclostus) gratiosus (Waagen), Waagenites soochowensis (Chao) and many other Longtan period common elements; (2) Zhongdian Simao slot and ironworks near the section. Its lithology is a large set