chronostratigraphic reference point
C23923
concept
A chronostratigraphic reference point is a precisely defined boundary in geological time, often marked by a Global Boundary Stratotype Section and Point (GSSP), used to correlate and standardize rock layers and time intervals worldwide.
Observed surface forms (5)
- stratigraphic boundary marker ×4
- Permian–Triassic boundary section ×1
- geologic time scale reference ×1
- geological time scale boundary marker ×1
- stratigraphic boundary definition ×1
Instances (9)
- Global Boundary Stratotype Section and Point for base of Hettangian
- Meishan section, South China via concept surface "Permian–Triassic boundary section"
- Global Boundary Stratotype Section and Point via concept surface "stratigraphic boundary marker"
- GSSP at Aidaralash Creek, Kazakhstan (base of Asselian) via concept surface "stratigraphic boundary marker"
- Eifelian GSSP at Wetteldorf, Germany via concept surface "stratigraphic boundary marker"
- Global Boundary Stratotype Section and Point for the base of the Anisian
- GSSP at Enorama Creek, Flinders Ranges, South Australia via concept surface "geological time scale boundary marker"
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Global Standard Stratigraphic Age (GSSA)
surface form: Global Standard Stratigraphic Age
- Global Boundary Stratotype Section and Point for base at Peniche, Portugal via concept surface "stratigraphic boundary marker"