PL.HAACHT 74W Service Géologique
MAJOR F.W. SHOTTON de Belgique
121 (VI) Army Borehole at Thildonck. Au couvent. Puits No 1
Sondage à sec
No I Borehole. Surface Height 14m.
Depth 120 feet (36.58m)
Final diameter 6 inches, plain tubing from O to 25.3m.
perforated tubing, gauze-wrapped, and packed outside
with graded sand, 25.3 to 35.0m.
Plain tubing 35.0 - 36.58m.
Rest water level 1.8m below surface
Water level 17.0m. below surface with a yield of 700
gals 3.2m3 /hour
Tested yield of borehole, 1300 gallons (6 m3) /hour
Position of pump suction 24.9m. below surface.
Feet Métres
1. Yellow sandy loam 0- 10 0.00- 3.05
2* Yellowish grey, slightly micaceous
fine sand 10- 17 3.05- 5.18
3 - 4. Very fine, clean, grey, slightly 17- 34 5.18-10.37
5* Fine light grey sand with
calcareous sandstone 34- 49 10.37-14.93
6. Fine light grey sand; slightly
clayey 49- 50 14.93-15.24
7. Fine light grey sand with
calcareous sandstone 50- 66 15.24-20.12
8. Medium grey green sand, slightly
clayey, some calcareous
sandstone 66- 71 20.12-21.64
9. Fine light grey sand, slightly
clayey, with calcareous
sandstone 71- 80 21.64-24.39
10. Medium grey green sand with
calcareous and siliceous
sandstone 80- 97 24.39-29.57
11*. Fine light grey sand 97-104 29.57-31.70
12. Medium grey-green sand with
calcareous sandstone 104-105 31.70-32.00
13*-14. Fine grey sand with siliceous
sandstone and shell fragments 105-110 32.00-33.53
15. Medium clean quartzose
glauconitic sand with calcareous
& silliceous sandstone 110-120 33.53-36.58
(0.00- 3.05m Quaternary)
(3.05-36.58m Bruxellian)
Numerotatie bijgevoegd door R. Legrand 2-IV-1949.
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Puits No 2 Sondage à sec
Army Boreholes. Thildonck.
Surface height 14m.
Depth 118 ' (36m)
Final diameter 6 inches
Plain casing 0-23.5m
Perforated casing gauze-Wrapped and surrounded by 1-3mm
Lessines chippings 23.5-34.4m.
Plain casing 34.4-36m.
Rest water level 1.8m below surface
Water level 12.2m below surface 750 gals (3.4.m3) hour
Tested yield, 1300 gals (6m3) hour
Position of pump suction 22.7 m below surface.
feet mètres
1. Dark brown sandy loam 0- 2 0.00- 0.61
2. Light " loamy fine sand 2- 3 0.61- 0.91
3. Dark brown fine to medium loamy sand 3- 5 0.91- 1.52
4. Dark brown fine loamy sand 5- 8 1.52- 2.44
5* Dark brown fine loamy sand with
pebbles of flint and sandstone 8- 14 2.44- 4.27
6* Fine slightly clayey green sand,
abundant glauconie and a little mica 14- 38 4.27-11.58
7* Band of nodular micaceous fine
siderite sandstone 38 11.58
8. Fine dark grey clayey sand 38- 39 11.58-11.88
9* Light grey fine loamy sand, with
scattered glauconite, cemented in
parts occasional shell fragments 39- 45 11.88-13.71
10.11 Fine grey sand sparse glauconite,
some shell fragments, weakly
cemented in places 45- 52 13.71-15.88
12 à 16 Idem, with siliceous sandstones
between 23.8 and 25.6 m and
between 27.4 and 28.7 m. 52- 90 15.85-27.44
17. Clean, fine to medium brown-grey
quartzite sand, much glauconite,
some mica, some feeble cementation 90- 94 27.44-28.66
18. Fine grey slithtly loamy sand with
some glauconite and scattered mica 94- 96 28.66-29.26
19. Idem, with siliceous sandstone bands 96- 98 29.26-29.87
20.21 Idem, with thin yellowish clayey
(? calcarous) bands and siliceous
bands 98-104 29.87-31.70
22à27* Fine, fairly clean sand with
siliceous glauconitic sandstone
bands, some mica and shell
fragments 104-116 31.70-35.36
28 Fine clean grey glauconite
quartzose sand 116-118 35.33-35.96
(0-4.27 m Quaternary ) (numerotatie bijgevoegd door
(4.27-35.96m Bruxellian) R. Legrand, 2-IV-1949)
Analysis of water
Total hardness, as CaCO3 19.3 parts per 100.000
Temporary hardness as CaCO3 19.3 " " "
Permanent hardness nil
Total alkalinity, as CaCO3 21.4 " " "
Salinity, as NaCl 2.9 " " "
