| Name | Ubja F-13 borehole (phosphorite) |
| Number | F-13 |
| Type | borehole (section) |
| Country | Estonia |
| Parish | Sõmeru |
| Coordinates | null, null |
| Remarks | fosforiidiaugud, originaaltähistuses ladina F erinevalt vundamendi kirillitsa F-ist Puurauk F-13 on käsikirjalistes materjalides nii Ubja kui Toolse nimega, kohati isegi Ubja-Toolse! |
| Date added | 2003-05-20 |
| Date changed | 2018-11-07 |
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