Stirnas Formation
| Belongs to | Baltic lithostratigraphy (Ordovician) |
| Type | lithostratigraphy |
| Rank | Formation |
| Scope | regional |
| Status | formal standard |
| Author | Ulst & Gailīte |
| Year | 1976 |
| Etymon | Stirnas, village (L) |
| Original locality | Stirnas-18 core, 978-988 m |
| Age (Ma) | Lasnamägi Stage |
| Alt. index | O2st |
| Date added | 2011-08-18 |
| Date changed | 2011-08-19 |
Locality | Type | From (m) | To (m) | Reference | Remarks | |
|---|---|---|---|---|---|---|
| Stirnas 18 borehole | holostratotype | 978 | 988 | Ulst & Gailite, 1976 | ||
| Saldus 5PM borehole | neostratotype | 1096 | 1107.5 | Brangulis et al., 1989 |
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