ICS International Chronostratigraphic Chart 2024/12

International Commission on Stratigraphy

ICS International Chronostratigraphic Chart 2024/12

International Commission on Stratigraphy

IUGS ICS International Commission on Stratigraphy

Research output: Contribution to conference › Poster › Other research output

Abstract

Units of all ranks are in the process of being defined by Global Boundary

Stratotype Section and Points (GSSP) for their lower boundaries, including

those of the Archean and Proterozoic, long defined by Global Standard

Stratigraphic Ages (GSSA). Ratified Subseries/Subepochs are abbreviated as

U/L (Upper/Late), M (Middle) and L/E (Lower/Early). Italic fonts indicate informal

units and placeholders for unnamed units. Previous versions and detailed

information on ratified GSSPs are available at the website

http://www.stratigraphy.org. The URL to this chart is provided below.

Numerical ages are subject to ongoing revision and do not define units in the

Phanerozoic and the Ediacaran; only GSSPs do. For boundaries in the

Phanerozoic without ratified GSSPs or without constrained numerical ages, an

approximate numerical age (~) is provided.

Most numerical ages are taken from ‘A Geologic Time Scale 2020’ by Gradstein

et al. (2020), but some ages differ as provided by the relevant ICS

subcommissions, with advice from the Timescale Calibration subcommission.

These are approved by the ICS executive as the current consensus.

Original language	English
Number of pages	1
Publication status	Published - Dec 2024

Keywords

STRATIGRAPHY
Chronostratigraphy

Access to Document

https://stratigraphy.org/ICSchart/ChronostratChart2024-12.pdfLicence: Other

4 Other
2 Article
1 Poster

The ICS International Chronostratigraphic Chart this decade
Cohen, K. M., Harper, D. A. T., Gibbard, P. L. & Car, N., 15 Feb 2025, In: Episodes. 48, 1, p. 105-115 11 p.
Research output: Contribution to journal › Article › Academic › peer-review

Open Access
File
ICS International Chronostratigraphic Chart 2023/09
Cohen, K. M., Harper, D. A. T., Gibbard, P. L. & Car, N., Sept 2023. 1 p.
Research output: Contribution to conference › Poster › Other research output

Open Access
ICS International Chronostratigraphic Chart 2018/08
Cohen, K. M., Harper, D. A. T., Gibbard, P. L. & Fan, J.-X., Aug 2018. 1 p.
Research output: Contribution to conference › Other › Academic
ICS International Chronostratigraphic Chart 2017/02
Cohen, K. M., Harper, D. A. T. & Gibbard, P. L., Feb 2017. 1 p.
Research output: Contribution to conference › Other › Other research output

File
ICS International Chronostratigraphic Chart 2016/04
Cohen, K. M., Finney, S. C. & Gibbard, P. L., Apr 2016. 1 p.
Research output: Contribution to conference › Other › Other research output

Open Access
File

Cite this

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title = "ICS International Chronostratigraphic Chart 2024/12",

abstract = "Units of all ranks are in the process of being defined by Global BoundaryStratotype Section and Points (GSSP) for their lower boundaries, includingthose of the Archean and Proterozoic, long defined by Global StandardStratigraphic Ages (GSSA). Ratified Subseries/Subepochs are abbreviated asU/L (Upper/Late), M (Middle) and L/E (Lower/Early). Italic fonts indicate informalunits and placeholders for unnamed units. Previous versions and detailedinformation on ratified GSSPs are available at the websitehttp://www.stratigraphy.org. The URL to this chart is provided below. Numerical ages are subject to ongoing revision and do not define units in thePhanerozoic and the Ediacaran; only GSSPs do. For boundaries in thePhanerozoic without ratified GSSPs or without constrained numerical ages, anapproximate numerical age (\textasciitilde{}) is provided. Most numerical ages are taken from {\textquoteleft}A Geologic Time Scale 2020{\textquoteright} by Gradsteinet al. (2020), but some ages differ as provided by the relevant ICSsubcommissions, with advice from the Timescale Calibration subcommission.These are approved by the ICS executive as the current consensus.",

keywords = "STRATIGRAPHY, Chronostratigraphy",

author = "K.M. Cohen and Nicholas Car and \{International Commission on Stratigraphy\}",

year = "2024",

month = dec,

language = "English",

}

TY - CONF

T1 - ICS International Chronostratigraphic Chart 2024/12

AU - Cohen, K.M.

AU - Car, Nicholas

AU - International Commission on Stratigraphy

PY - 2024/12

Y1 - 2024/12

N2 - Units of all ranks are in the process of being defined by Global BoundaryStratotype Section and Points (GSSP) for their lower boundaries, includingthose of the Archean and Proterozoic, long defined by Global StandardStratigraphic Ages (GSSA). Ratified Subseries/Subepochs are abbreviated asU/L (Upper/Late), M (Middle) and L/E (Lower/Early). Italic fonts indicate informalunits and placeholders for unnamed units. Previous versions and detailedinformation on ratified GSSPs are available at the websitehttp://www.stratigraphy.org. The URL to this chart is provided below. Numerical ages are subject to ongoing revision and do not define units in thePhanerozoic and the Ediacaran; only GSSPs do. For boundaries in thePhanerozoic without ratified GSSPs or without constrained numerical ages, anapproximate numerical age (~) is provided. Most numerical ages are taken from ‘A Geologic Time Scale 2020’ by Gradsteinet al. (2020), but some ages differ as provided by the relevant ICSsubcommissions, with advice from the Timescale Calibration subcommission.These are approved by the ICS executive as the current consensus.

AB - Units of all ranks are in the process of being defined by Global BoundaryStratotype Section and Points (GSSP) for their lower boundaries, includingthose of the Archean and Proterozoic, long defined by Global StandardStratigraphic Ages (GSSA). Ratified Subseries/Subepochs are abbreviated asU/L (Upper/Late), M (Middle) and L/E (Lower/Early). Italic fonts indicate informalunits and placeholders for unnamed units. Previous versions and detailedinformation on ratified GSSPs are available at the websitehttp://www.stratigraphy.org. The URL to this chart is provided below. Numerical ages are subject to ongoing revision and do not define units in thePhanerozoic and the Ediacaran; only GSSPs do. For boundaries in thePhanerozoic without ratified GSSPs or without constrained numerical ages, anapproximate numerical age (~) is provided. Most numerical ages are taken from ‘A Geologic Time Scale 2020’ by Gradsteinet al. (2020), but some ages differ as provided by the relevant ICSsubcommissions, with advice from the Timescale Calibration subcommission.These are approved by the ICS executive as the current consensus.

KW - STRATIGRAPHY

KW - Chronostratigraphy

M3 - Poster

ER -

ICS International Chronostratigraphic Chart 2024/12

Abstract

Keywords

Access to Document

Fingerprint

Research output

The ICS International Chronostratigraphic Chart this decade

ICS International Chronostratigraphic Chart 2023/09

ICS International Chronostratigraphic Chart 2018/08

ICS International Chronostratigraphic Chart 2017/02

ICS International Chronostratigraphic Chart 2016/04

Cite this