Guizhulin Fm
Type Locality and Naming
Northernmost Taiwan. Upper formation of Sanxia Gr. The type section is located at Houlongxi, Miaoli County, Taiwan Province. It was named by Torii K. and Yoshimasa K. in 1931. Original definition was proposed by Ishizaka (1942).
Synonym: Gueichulin Fm
Lithology and Thickness
Lower part is characterized by the grayish white sandstone intercalated with dark grey shale; Middle part by gray to dark gray thick shale; Upper part by interbeds of gray and yellow moderately thick fine sandstone intercalated with thin shale. Calcareous nannofossils are abundant. The thickness is 700-1000 m.
Relationships and Distribution
Lower contact
Jinshui Fm is conformable in contact to the underlying Nanzhuang Fm.
Upper contact
Jinshui Fm is conformable in contact to the overlying Jinshui Fm, respectively.
Regional extent
The formation is distributed in Miaoli County.
GeoJSON
Fossils
Discoaster quinqueramus, Ceratolithus rugosus, Sphenolithus abies, Pulleniatina obliquiloculata, Globorotalia tumida, Sphaeroidinella dehiscens, Globigerina nepenthus.
Age
Depositional setting
It is interpreted as an epicontinental marine environment.
Additional Information