startBoundary
P64686
predicate
Indicates the point, limit, or marker where something begins or where a specified interval, region, or process first comes into effect.
Observed surface forms (4)
| Surface form | Occurrences |
|---|---|
| startBoundaryDefinedBy | 3 |
| blockStart | 2 |
| startBoundaryMarks | 2 |
| stageBoundary | 1 |
Sample triples (12)
| Subject | Object |
|---|---|
| Middle Devonian | Emsian–Eifelian boundary ⓘ |
| Late Triassic | Carnian age ⓘ |
| Cryptozoic | formation of Earth ⓘ |
| Terreneuvian | first appearance of complex trace fossils via predicate surface "startBoundaryDefinedBy" ⓘ |
| Terreneuvian | first appearance of widespread complex animal life in the fossil record via predicate surface "startBoundaryDefinedBy" ⓘ |
| Terreneuvian | base of Cambrian via predicate surface "startBoundaryMarks" ⓘ |
| Terreneuvian | base of Phanerozoic via predicate surface "startBoundaryMarks" ⓘ |
| Early Cretaceous | Cretaceous–Jurassic boundary NERFINISHED ⓘ |
|
Deşli Caira section, Romania
surface form:
Deşli Caira section
|
Olenekian–Anisian boundary via predicate surface "stageBoundary" ⓘ |
| Supplemental Arrows-A | U+27F0 via predicate surface "blockStart" ⓘ |
| Miscellaneous Mathematical Symbols-B | U+2980 via predicate surface "blockStart" ⓘ |
| Sheinwoodian | first appearance datum of the graptolite Cyrtograptus centrifugus via predicate surface "startBoundaryDefinedBy" ⓘ |