| Borehole Number: |
| Prospecting Company: De Beers Holdings Botswana |
| Prospecting License No.: PL51/88 |
| Coordinates Type: WGS 84 |
| Coordinates Format: Decimal Degrees (DD) |
| Coordinates: -20.38703 , 24.28667 |
| Location: Senagom |
| 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): 258 Metres |
| Hole Diameter: N/A |
| Log Formation: |
| No. | From (m) | To (m) | Log Formation |
|---|
| 1. | 0 | 2 | Residual Topsoil (lithic fragments, calcified grass fragments, pedotubes). |
| 2. | 2 | 22 | Lake sediments - I) hardpan nodular and powder clcrete, with calcretized Sandstone hosting tabular trace fossils (placelites) and fragments of calcified grass. Magnetic susceptibility = 10 dkx10-6. |
| 3. | 22 | 31 | ii) Sandstone - calcretised, texturally immature becoming Silcretezd at depth. |
| 4. | 31 | 42 | iii) Green glauconitic mudstone. Magetic suscept = 20 dkx 10-6. |
| 5. | 42 | 48 | iv) Various calcrete and Sandstone with fossil fragments (as at 3m). |
| 6. | 48 | 78 | v) Polymictic gravel horizon rounded to angular fragments of calcrete, Silcrete and Sandstone. Mag suscep = 20 dkx 10-6. |
| 7. | 78 | 113 | vi) Evaporite deposits gypsum/ dolomite euhedra intercalated with grey to light brown clay. Mag suscept 10-20dkx10-6. |
| 8. | 113 | 141 | vii) Polymictic pebble horizon (lithic fragments), (evaporite deposits as at 79m). |
| 9. | 141 | 156 | viii) Mudstone - green, glauconitic, hosting gypsum euhedra. |
| 10. | 156 | 160 | ix) Sandstone - dark grey, fine grained, pyritised. Mag suscept = 20 dkx10-6. |
| 11. | 160 | 238 | Description too long to fit in SQL. Please refer to file. |
| 12. | 238 | 239 | xi) Arkosic Sandstone - coarse grained, texturally and mineralogically immature light red in colour. Mag suscept = 390 dkx 10-6. |
| 13. | 239 | 257 | Karoo bslt - I) wthrd, light red to brown, amygdaloidal . Mag suscept 490-1120 dkx 10-6. |
| 14. | 257 | 258 | ii) Fresh, dark grey to black, porphiritic. Mag suscept = 2430 dkx 10-6. |
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