Heyeba Fm
Type Locality and Naming
Motianling subregion. The type section is located between Heyeba and Lingyansi, south of Lueyang County, Shaanxi Province. It was named by Du Dinghan et al. in 1986.
Lithology and Thickness
Sandstone, limestone. Lower part of this formation, 53 m thick, is composed of dark brownish-gray medium- to thick-bedded quartz sandstone intercalated with sandy slate.
Middle part of the formation, 294.7 m thick, is composed of gray to dark-gray thin- to medium-bedded limestone and clayey limestone intercalated with calcareous slate and carbonate-bearing calcareous slate.
Upper part, 229.4 m thick, is gray to dark-gray thin- to thick-bedded limestone, clayey limestone and sandy dolomitic limestone.
Relationships and Distribution
Lower contact
It overlies with a slightly angular unconformity on the Tabo Fm of Lower to Middle Devonian.
Upper contact
The upper contact with the overlying Lueyang Fm is unclear.
Regional extent
The formation is distributed from Jinjiahe to Hejiayan in Lueyang County, and appears often intermittently.
GeoJSON
Fossils
In middle part, it yields coral Disphyllum, Waptiphyllum, Pseudozaphrentis, Alveolites and conodonts Palmatodella.
Age
Depositional setting
Additional Information