A Global Boundary Stratotype Section and Point (GSSP), sometimes referred to as a golden spike, is an internationally agreed upon reference point on a...

1874. The GSSP for the base of the Sakmarian is located at the Usolka section in the southern Urals, which was ratified in 2018. The GSSP is defined...

Since 1977, Global Boundary Stratotype Sections and Points (abbreviated GSSPs) are internationally agreed upon reference points on stratigraphic sections...

Greenlandian Age is the GSSP sample from the North Greenland Ice Core Project in central Greenland (75.1000°N 42.3200°W). The Greenlandian GSSP has been correlated...

Northgrippian ages/stages. Its Global Boundary Stratotype Section and Point (GSSP) is a Krem Mawmluh Cave formation in Meghalaya. Mawmluh cave is one of the...

ratify rock units based on a Global Boundary Stratotype Section and Point (GSSP) from a single formation (a stratotype) identifying the lower boundary of...

ratify global stages based on a Global Boundary Stratotype Section and Point (GSSP) from a single formation (a stratotype) identifying the lower boundary of...

for River Aube in France. A Global Boundary Stratotype Section and Point (GSSP), ratified by the IUGS in 2016, defines the base of the Albian as the first...

ratify global stages based on a Global Boundary Stratotype Section and Point (GSSP) from a single formation (a stratotype) identifying the lower boundary of...

ratify global stages based on a Global Boundary Stratotype Section and Point (GSSP) from a single formation (a stratotype) identifying the lower boundary of...

the town of Fortune on the Burin Peninsula, near the GSSP and Fortune Bay. The type locality (GSSP) of the Fortunian stage is in Fortune Head, at the northern...

appearance of the inoceramid bivalve Cladoceramus undulatoplicatus. The GSSP (official reference profile) for the base of the Santonian Stage is located...

and changing diversity. The epoch was named after Llandovery in Wales. The GSSP for the Silurian is located in a section at Dob's Linn (southern Scotland)...

record. An official reference profile for the base of the Cenomanian (a GSSP) is located in an outcrop at the western flank of Mont Risou, near the village...

the extinction of crinoid species Marsupites testudinarius is located. A GSSP was ratified for the base of the Campanian in October 2022, having been placed...

end of the Marinoan ice age. The lower global boundary stratotype section (GSSP) of the Ediacaran is at the base of the cap carbonate (Nuccaleena Formation)...

Stratotype Section and Point (GSSP) for the Hirnantian Stage. Wangjiawan section The reference lower rock boundary (GSSP) of the Hirnantian is the Wangjiawan...

rocks of this age are found, including the type section. The type locality (GSSP) of the Terreneuvian is in Fortune Head, at the northern edge of the Burin...

name Guzhangian is derived from Guzhang County, Hunan Province, China. The GSSP is defined in the Huaqiao Formation in Hunan. The precise base of the Guzhangian...

The Global Boundary Stratotype Section and Point (GSSP) of the Lower Ordovician, which is also a GSSP of the Tremadocian stage and the whole Ordovician...

(a GSSP) for the Berriasian has been under active consideration by the Berriasian Working Group (ISCS) of IUGS since 2010. A range of contender GSSP localities...

the Miaoling Mountains, Guizhou, China. Three sections were discussed as GSSP candidates: the Wuliu-Zengjiayan section near Balang in Guizhou province...

Section and Point (GSSP) has been approved, the lower boundary of the earliest stage determines numerical age of an epoch. The GSSP for the Wuchiapingian...

event. Lower boundary GSSP El Kef Section, El Kef, Tunisia 36°09′13″N 8°38′55″E / 36.1537°N 8.6486°E / 36.1537; 8.6486 Lower GSSP ratified 1991 Upper...

Katian is derived from Katy Lake (Atoka County, Oklahoma, United States). The GSSP of the Katian Stage is the Black Knob Ridge Section in southeastern Oklahoma...

Stratigraphy (ICS) tried to make a single geologic time scale based on GSSP's, which could be used internationally. The Quaternary subdivisions were defined...

Boundary Stratotype Section and Point (GSSP): overview Chart of The Global Boundary Stratotype Sections and Points (GSSP): chart Geotime chart displaying geologic...

or earliest age of the Jurassic). The base of the Rhaetian lacks a formal GSSP, though candidate sections include Steinbergkogel in Austria (since 2007)...

CN10b) and the first appearance of nanoplankton Ceratolithus acutus. The GSSP for the Zanclean is in the vicinity of the ruins of the ancient city of Heraclea...

the "lotus state". The lower boundary is defined in the same way as the GSSP of the Paibian Stage. Both begin with the first appearance of the trilobite...