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This is a list of Global Boundary Stratotype Sections and Points. 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 .
Because defining a GSSP depends on finding well-preserved geologic sections and identifying key events, this task becomes more difficult as one goes farther back in time. Before 630 million years ago, boundaries on the geologic timescale are defined simply by reference to fixed dates, known as "Global Standard Stratigraphic Ages" (GSSAs).
A stratotype or type section in geology is the physical location or outcrop of a particular reference exposure of a stratigraphic sequence or stratigraphic boundary. If the stratigraphic unit is layered, it is called a stratotype, whereas the standard of reference for unlayered rocks is the type locality. [1] Also it can be defined as "The ...
This is a list of free and open-source software for geological data handling and interpretation. The list is split into broad categories, depending on the intended use of the software and its scope of functionality. Notice that 'free and open-source' requires that the source code is available and users are given a free software license.
The Global Boundary Stratotype Section and Point (GSSP): overview; Chart of The Global Boundary Stratotype Sections and Points (GSSP): chart; Geotime chart displaying geologic time periods compared to the fossil record – Deals with chronology and classifications for laymen (not GSSPs)
The Brunhes–Matuyama reversal is a marker for the Global Boundary Stratotype Section and Point (GSSP) defining the base of the Chibanian Stage and Middle Pleistocene Subseries at the Chiba section, Japan, which was officially ratified in 2020 by the International Union of Geological Sciences.
The Global Boundary Stratotype Section and Point of the Dapingian is the Huanghuachang section (), in Huanghuachang, Yichang, It is an outcrop of the Dawan Formation . The lower boundary is defined as the first appearance of the conodont species Baltoniodus triangularis in the type section.
The official Global Boundary Stratotype Section and Point (GSSP) was established in the Zumaia section at the beach of Itzurun in the Basque Country, northern Spain. [6] The Global Boundary Stratotype Section and Point (GSSP) marking the lower boundary of the Selandian at Itzurun, Spain