geological boundary
C3981
concept
A geological boundary is a conceptual division in the Earth's crust that separates distinct rock units, layers, or geological features based on differences in age, composition, structure, or formation history.
All labels observed (11)
| Label | Occurrences |
|---|---|
| Global Boundary Stratotype Section and Point | 17 |
| crustal boundary | 2 |
| geologic boundary region | 2 |
| geological boundary canonical | 2 |
| geological unconformity | 2 |
| geologic boundary | 1 |
| geologic boundary zone | 1 |
| geological boundary zone | 1 |
| geophysical boundary | 1 |
| stratigraphic marker | 1 |
| structural margin | 1 |
Instances (30)
| Instance | Via concept surface |
|---|---|
| Siccar Point unconformity | geological unconformity |
| Global Boundary Stratotype Section and Point at Klonk, Czech Republic | Global Boundary Stratotype Section and Point |
| Global Boundary Stratotype Section and Point for base of Hettangian | Global Boundary Stratotype Section and Point |
|
Meishan section China for base of Triassic
surface form:
Meishan section
|
Global Boundary Stratotype Section and Point |
| South Yorkshire Coalfield margin | geological boundary zone |
| New Jersey Highlands and Piedmont transition zone | geologic boundary |
|
Lemme-Carrosio section, Italy (Miocene GSSP)
surface form:
Lemme-Carrosio section
|
Global Boundary Stratotype Section and Point |
| Meishan section, South China | Global Boundary Stratotype Section and Point |
| Gutenberg discontinuity | geophysical boundary |
| GSSP at Aidaralash Creek, Kazakhstan (base of Asselian) | Global Boundary Stratotype Section and Point |
| Kellwasser horizons | stratigraphic marker |
|
named after Siccar Point headland
surface form:
Siccar Point unconformity
|
geological unconformity |
| Pridoli section near Prague, Czech Republic | Global Boundary Stratotype Section and Point |
| Eifelian GSSP at Wetteldorf, Germany | Global Boundary Stratotype Section and Point |
| Klonk Section | Global Boundary Stratotype Section and Point |
|
Klonk, near Suchomasty, Czech Republic
surface form:
Klonk
|
Global Boundary Stratotype Section and Point |
| Klonk | Global Boundary Stratotype Section and Point |
| Piedmont-Atlantic Coastal Plain fall line | — |
| Cretaceous–Paleogene boundary | — |
| Global Boundary Stratotype Section and Point for the base of the Anisian | Global Boundary Stratotype Section and Point |
|
Deşli Caira section, Romania
surface form:
Deşli Caira section
|
Global Boundary Stratotype Section and Point |
| GSSP at Enorama Creek, Flinders Ranges, South Australia | Global Boundary Stratotype Section and Point |
| Midcontinent Granite-Rhyolite Province margins | crustal boundary |
| Global Boundary Stratotype Section and Point for base at Peniche, Portugal | Global Boundary Stratotype Section and Point |
| Basin and Range–Colorado Plateau transition | geologic boundary zone |
| Appalachian Plateau and Blue Ridge transition zone | geologic boundary region |
|
Monte dei Corvi section, Italy (Tortonian base)
surface form:
Monte dei Corvi section
|
Global Boundary Stratotype Section and Point |
|
Oued Akrech section, Morocco (base of Zanclean, Pliocene)
surface form:
Oued Akrech section
|
Global Boundary Stratotype Section and Point |
| Narmada–Son lineament | crustal boundary |
| Willamette Valley–Coast Range transition zone | geologic boundary region |