Callovian
General info
| Belongs to |
Middle Jurassic
|
| Type | chronostratigraphy |
| Rank | Stage |
| Scope | global |
| Status | informal standard |
| Author | d’Orbigny |
| Year | 1842 |
| Etymon | Kellaways, place in Wiltshire, England |
| Age top (Ma) | 161.5 |
| Age base (Ma) | 165.3 |
| Date changed | 2022-11-04 |
| Reference | Content | Year1 | Pages | Remarks |
|---|---|---|---|---|
| Gradstein et al., 2004 |
2004
| |||
| Gradstein et al., 2012 |
2012
| 876 | ||
| Hesselbo et al., 2020 |
2020
| 955-1022 |
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