| Name | Maardu M-9 borehole |
| Number | M-9 |
| Type | borehole (section) |
| Country | Estonia |
| Parish | Kohila |
| Settlement | Angerja |
| Elevation | 59.50 |
| Coordinates | 59.175797, 24.814867 |
| Coordinate precision | 1-10 km |
| Coord. method | Est Land Board map server |
| Coord. agent | Aaloe, Aasa |
| Location remarks | Angerja oja kaldal Urge-Kolu mnt-st ca 0.5 km põhja pool. Puuraukude F-288 (Angerja) ja F-289 (Salutaguse) vahel. Urgelt ca 2 km ida pool |
| Strat. top | Nabala Stage |
| Strat. base | Lower Cambrian (old nomenclature) |
| Remarks | Puuritud fosforiidile 1983 või varem |
| Estonian Land Board ID | 16266 |
| Date changed | 2021-02-28 |
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