The Jiangshanian is the middle stage of the

Furongian The Furongian is the fourth and final epoch and series of the Cambrian. It lasted from to million years ago. It succeeds the Miaolingian series of the Cambrian and precedes the Lower Ordovician Tremadocian Stage. It is subdivided into three ...

series. It follows the

Paibian The Paibian is the lowest stage of Furongian series of the Cambrian. It follows the Guzhangian ( 3rd series of the Cambrian) and is succeeded by the Jiangshanian Stage. The base is defined as the first appearance of the trilobite '' Glyptagnostus ...

Stage and is succeeded by the still unnamed Stage 10 of the

Cambrian The Cambrian Period ( ; sometimes symbolized C with bar, Ꞓ) was the first geological period of the Paleozoic Era, and of the Phanerozoic Eon. The Cambrian lasted 53.4 million years from the end of the preceding Ediacaran Period 538.8 million ...

. The base is defined as the first appearance of the

trilobite Trilobites (; meaning "three lobes") are extinct marine arthropods that form the class Trilobita. Trilobites form one of the earliest-known groups of arthropods. The first appearance of trilobites in the fossil record defines the base of the At ...

Agnostotes orientalis ''Agnostotes orientalis'' is a species of agnostid trilobite belonging to the genus '' Agnostotes''. It existed during the Jiangshanian Age ( million years ago) of the Cambrian. It is an important index fossil in biostratigraphy. Description ' ...

'' which is estimated to be million years ago. The Jiangshanian lasted until approximately million years ago. The Cambrian stage was named after

Jiangshan Jiangshan () is a county-level city located in Quzhou prefecture-level city, in the southwest of Zhejiang Province, China, bordering Jiangxi province to the west. Located about 250 kilometers southwest of Hangzhou, the provincial capital, it is ...

, a city in China's

Zhejiang Zhejiang ( or , ; , also romanized as Chekiang) is an eastern, coastal province of the People's Republic of China. Its capital and largest city is Hangzhou, and other notable cities include Ningbo and Wenzhou. Zhejiang is bordered by Jiang ...

province. The

GSSP A Global Boundary Stratotype Section and Point (GSSP) is an internationally agreed upon reference point on a stratigraphic section which defines the lower boundary of a stage on the geologic time scale. The effort to define GSSPs is conducted b ...

of the Jiangshanian is the "Duibian B Section" (), west of the village of Duibian(碓边), and 10 km north of

. The outcrop belongs to the Huayansi Formation(华严寺组).

References

Cambrian geochronology Geological ages {{Geology-stub