Guanyintai Fm
Type Locality and Naming
The type section of Guanyintai Formation is located east of Guanyintai (119°14’E, 32°36’ N), lying 16 km north of the seat of Jurong County, Jiangsu Province. The section is measured by Jiangsu Regional Geological Survey Team of Heavy Industry Bureau in 1989. The Guanyintai Formation was named by Jiangsu Regional Geological Survey Team of Heavy Industry Bureau (1970). The name is derived from Guanyintai, a flat ground on hill-ridge of Lunshan Range, northern Jurong County, Zhenjiang City, southwestern Jiangsu Province.
Synonym: （观音台组）
Lithology and Thickness
The Guanyintai Formation is a carbonate sequence, consisting of greyish white, light grey and dark grey moderately thin- to thick-bedded dolomite with cherty bands and nodules. In the type section, the Guanyintai Formation is 624.73 m thick.
Relationships and Distribution
Lower contact
The Guanyintai Fm is in conformable contact with different underlying Cambrian formations. In the Nanjing-Zhenjiang Hills, southwestern Jiangsu Province and in Anqing, Chizhou, and Chaohu cities, south-central Anhui Province, it rests on the Paotaishan Fm; in Kunshan County, southern Jiangsu Province, on the Tuanshan Fm, and in Jingxian, Qingyang, Shita, and Dongzhi counties, southern Anhui Province on the Chingkeng Fm.
Upper contact
The Guanyintai Fm is in conformable contact with overlying Lunshan Fm (Ordovician).
Regional extent
The Guanyintai Formation is exposed in both the Yangtze and the Jiangnan Slope areas of South China Region, distributed in southwestern Jiangsu Province (Nanjing and Zhenjiang cities) and southern Anhui Province (Anqing, Chaohu, Chizhou, Jingxian, Qingyang, Shita, and Dongzhi cities or counties). It is also known, by drill hole, in Kunshan, southern Jiangsu Province.
GeoJSON
Fossils
No fossil is known from the Guanyintai Formation yet.
Age
Depositional setting
Additional Information