Search results
Results From The WOW.Com Content Network
This work assessed the geologic history of the currently defined eons and eras of the pre-Cambrian, [note 3] and the proposals in the "Geological Time Scale" books 2004, [70] 2012, [3] and 2020. [71] Their recommend revisions [6] of the pre-Cryogenian geologic time scale were (changes from the current scale [v2023/09] are italicised):
In the stratigraphy sub-discipline of geology, a Global Standard Stratigraphic Age, abbreviated GSSA, is a chronological reference point and criterion in the geologic record used to define the boundaries (an internationally sanctioned benchmark point) between different geological periods, epochs or ages on the overall geologic time scale in a chronostratigraphically useful rock layer.
Timeline geological timescale. The following five timelines show the geologic time scale to scale. The first shows the entire time from the formation of the Earth to the present, but this gives little space for the most recent eon. The second timeline shows an expanded view of the most recent eon. In a similar way, the most recent era is ...
The geological history of the Earth follows the major geological events in Earth's past based on the geological time scale, a system of chronological measurement based on the study of the planet's rock layers (stratigraphy). Earth formed about 4.54 billion years ago by accretion from the solar nebula, a disk-shaped mass of dust and gas left ...
e. The Meghalayan age is the name given in 2018, by the International Commission on Stratigraphy, to the current age or latest geologic age – or uppermost stage of the Quaternary. [3] It is also the upper, or latest, of three subdivisions of the Holocene epoch or series. [4][5] This way of breaking down time is based only on geology; for ...
The International Commission on Stratigraphy (ICS), sometimes unofficially referred to as the " International Stratigraphic Commission ", is a daughter or major subcommittee grade scientific daughter organization that concerns itself with stratigraphical, geological, and geochronological matters on a global scale.
Since 1977, Global Boundary Stratotype Sections and Points (abbreviated GSSPs) are internationally agreed upon reference points on stratigraphic sections of rock which define the lower boundaries of stages on the geologic time scale. They are selected by the International Commission on Stratigraphy based on multiple factors, but their ...
Human history. In the geologic time scale, the Northgrippian is the middle one of three ages or stages of the Holocene Epoch or Series. [3][4][5][6] It was officially ratified by the International Commission on Stratigraphy in June 2018 along with the earlier Greenlandian and later Meghalayan ages/stages.