Stratigraphy
Atla Subseries
| Belongs to | Harju Series |
| Type | chronostratigraphy |
| Rank | Subseries |
| Scope | regional |
| Status | proposed unit |
| Author | Nõlvak, J., Hints, O. & Männik, P. |
| Year | 2006 |
| Etymon | Atla manor |
| Age top (Ma) | 443.7 |
| Age base (Ma) | 449.8 |
| Age (Ma) | Upper Ordovician |
| Age reference | Webby et al., 2004 (eds) |
| Date added | 2011-07-20 |
| Date changed | 2013-09-07 |
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