| Name | Borehole No F-22 (phosphorite) |
| Number | F-22 |
| Type | borehole (section) |
| Country | Estonia |
| Coordinates | null, null |
| Location remarks | Tallinnast lõunas, Tõdva-Paekna kandis |
| Remarks | fosforiidipuurauk, originaaltähistuses ladina F erinevalt vundamendi kirillitsa F-ist |
| Date added | 2003-05-20 |
| Date changed | 2019-07-02 |
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