Serpukhovian

Serpukhovian
330.9 ± 0.2 – 323.2 ± 0.4 Ma PreꞒ Ꞓ O S D C P T J K Pg N
Paleogeography of the mid Serpukhovian, 325 Ma
Chronology
−360 — – −355 — – −350 — – −345 — – −340 — – −335 — – −330 — – −325 — – −320 — – −315 — – −310 — – −305 — – −300 — – Paleozoic D Carboniferous P Mississippian Pennsylvanian LD Early Middle Late Early Mid Late CS Famennian Tournaisian Viséan Serpukhovian Bashkirian Moscovian Kasimovian Gzhelian Asselian     ← Carboniferous Rainforest Collapse ← Mazon Creek Fossils ← End of Romer's Gap ← Start of Romer's Gap Subdivision of the Carboniferous according to the ICS, as of 2023.[1] Vertical axis scale: Millions of years ago
Etymology
Name formality	Formal
Usage information
Celestial body	Earth
Regional usage	Global (ICS)
Time scale(s) used	ICS Time Scale
Definition
Chronological unit	Age
Stratigraphic unit	Stage
Time span formality	Formal
Lower boundary definition	Not formally defined
Lower boundary definition candidates	FAD of the conodont Lochriea ziegleri
Lower boundary GSSP candidate section(s)	Verkhnyaya Kardailovka, Ural Mountains Nashui, Luodian County, Guizhou, China
Upper boundary definition	FAD of the conodont Declinognathodus nodiliferus
Upper boundary GSSP	Arrow Canyon, Nevada, USA 36°44′00″N 114°46′40″W / 36.7333°N 114.7778°W / 36.7333; -114.7778
Upper GSSP ratified	1996[2]

The Serpukhovian is in the ICS geologic timescale the uppermost stage or youngest age of the Mississippian, the lower subsystem of the Carboniferous. The Serpukhovian age lasted from 330.9 Ma to 323.2 Ma.^[3] It is preceded by the Visean and is followed by the Bashkirian. The Serpukhovian correlates with the lower part of the Namurian Stage of European stratigraphy and the middle and upper parts of the Chesterian Stage of North American stratigraphy.^[4]