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Exploration Borehole

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 Borehole Number: 105/12/X019/H1

 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 2Residual Topsoil (lithic fragments, calcified grass fragments, pedotubes).
2.2 22Lake 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 31ii) Sandstone - calcretised, texturally immature becoming Silcretezd at depth.
4.31 42iii) Green glauconitic mudstone. Magetic suscept = 20 dkx 10-6.
5.42 48iv) Various calcrete and Sandstone with fossil fragments (as at 3m).
6.48 78v) Polymictic gravel horizon rounded to angular fragments of calcrete, Silcrete and Sandstone. Mag suscep = 20 dkx 10-6.
7.78 113vi) Evaporite deposits gypsum/ dolomite euhedra intercalated with grey to light brown clay. Mag suscept 10-20dkx10-6.
8.113 141vii) Polymictic pebble horizon (lithic fragments), (evaporite deposits as at 79m).
9.141 156viii) Mudstone - green, glauconitic, hosting gypsum euhedra.
10.156 160ix) Sandstone - dark grey, fine grained, pyritised. Mag suscept = 20 dkx10-6.
11.160 238Description too long to fit in SQL. Please refer to file.
12.238 239xi) Arkosic Sandstone - coarse grained, texturally and mineralogically immature light red in colour. Mag suscept = 390 dkx 10-6.
13.239 257Karoo bslt - I) wthrd, light red to brown, amygdaloidal . Mag suscept 490-1120 dkx 10-6.
14.257 258ii) Fresh, dark grey to black, porphiritic. Mag suscept = 2430 dkx 10-6.

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