| Name | Maardu F-523 borehole |
| Number | F-523 |
| Type | borehole (section) |
| Country | Estonia |
| Parish | Jõelähtme |
| Settlement | Võerdla |
| Elevation | 42.00 |
| Coordinates | 59.453424, 25.06573 |
| X | 6591106 |
| Y | 560445 |
| Coord. agent | Eesti Geoloogiakeskus (EGK) |
| Strat. top | Väo Formation |
| Strat. base | Proterozoic |
| Remarks | Puuritud 1981 ehitusmaterjalidele; EGF 3947 |
| Estonian Land Board ID | 1389 |
| Date changed | 2022-11-21 |
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