Koigi Member
| Belongs to | Varbola Formation |
| Type | lithostratigraphy |
| Rank | Member |
| Original rank | alamlade |
| Scope | regional |
| Status | formal standard |
| Author | Männil |
| Year | 1962 |
| Etymon | Koigi vil. (E) |
| Original locality | Kamariku core |
| Age (Ma) | Juuru Stage |
| Index | G1-2V'K |
| Date added | 2009-04-21 |
| Date changed | 2024-03-05 |
Locality | Type | From (m) | To (m) | Reference | Remarks | |
|---|---|---|---|---|---|---|
| Kamariku borehole | holostratotype | 16.3 | 18.1 | Nestor, H. & Kala, 1968 | Püssi, partly destroyed | |
| Vistla 2 borehole | neostratotype | 10.3 | 11.3 | Nestor, H., 1993a | Särghaua dep. |
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