| Borehole Number: |
| Prospecting Company: De Beers Holdings Botswana |
| Prospecting License No.: PL51/88 |
| Coordinates Type: WGS 84 |
| Coordinates Format: Decimal Degrees (DD) |
| Coordinates: -20.62817 , 24.48533 |
| Location: Dikwalo |
| Start Drill: 1900-01-02 |
| End Drill: 1900-01-02 |
| Borehole Type: Exploration |
| Drilling Method: Core |
| Sample Type: Core |
| Depth of Surface Casing: N/A |
| Azimuth: Degrees |
| Hole Inclination: N/A |
| Collar Elevation: N/A |
| Borehole Water Strike: N/A |
| End of Hole (Depth): 169 Metres |
| Hole Diameter: N/A |
| Log Formation: |
| No. | From (m) | To (m) | Log Formation |
|---|
| 1. | 0 | 2 | Residual Topsoil. |
| 2. | 2 | 21 | Lake sediments: Sandstone: buff coloured, fine to coarse grained, hosting tubular trace fossils (placelites).Intercalated in part with homogenous grey siltstone magnetic susceptibility = 10-20 kx10. |
| 3. | 21 | 44 | (ii) green glaucacitic mudstone strongly laminated and intercalated with this Sandy horizons.mag suscept 20kx10 -6. |
| 4. | 44 | 46 | (iii) Evaporate deposits (green mudstone with abundant gypsum/dolomite euledra). |
| 5. | 46 | 48 | (iv) Rudaceous horizons; cabbles of playa Silcrete (10-20cm) (evaporate deposits mag suscept: 10-20 kx10 -6). |
| 6. | 48 | 95 | Sandstone - dark green, fine grained, friable. |
| 7. | 95 | 107 | Sandstone - fine grained matrix, bioturbated, hosting lenses of grey siltstone. |
| 8. | 107 | 111 | Siltstone - light green, friable, mag suscept = 30 kx10 -6. |
| 9. | 111 | 119 | Sandstone - grey - green, fine grained, mature, hosting pedocasts (clavelites). |
| 10. | 119 | 121 | Sandstone - dark green fine grained (as at 92m) mag suscept = 10 kx10 -6. |
| 11. | 121 | 129 | Sandstone - fine grained, post - calcretisation. |
| 12. | 129 | 134 | Mudstone - dark grey karoo bslt strongly caltered igneous horizon - pervasive dolomite alteration and secondary pyrite crystallisation. |
| 13. | 134 | 135 | Red grey igneous lithology, microcrystalline groundness hosting randomly ariented plagroclase megacrysts (= 1cm). |
| 14. | 135 | 169 | Magnetic susceptibility increases downwards from 40 to 8810 kx10 -6. |
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