Biržai Member
| Belongs to | Baltic lithostratigraphy (Ordovician) |
| Type | lithostratigraphy |
| Rank | Member |
| Scope | regional |
| Status | formal standard |
| Author | Lapinskas |
| Year | 1967 |
| Etymon | Biržai town, Lithuania |
| Date added | 2022-12-01 |
| Date changed | 2023-11-02 |
Locality | Type | From (m) | To (m) | Reference | Remarks | |
|---|---|---|---|---|---|---|
| Paroveja 9 borehole | holostratotype | 795.9 | 824.7 | Lapinskas, 1968 | ||
| Likenai 396 borehole | neostratotype | 817 | 839.9 |
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