102 DEPOSITS OF PHOSPHATE OF LIME. [bull. 46. 
Carbonate of lime 39. 500 
Carbonate of magnesia 0. 520 
Sulphate of lime Distinct trace 
Phosphate of lime 15.860 
Phosphate of magnesia Trace 
Perphosphate of iron „ „„ 9.200 
Phosphate of alumina 4.708 
Peroxide of iron... None 
Alumina 6. 212 
Fluoride of calcium 1.698 
Silicic acid 10.601 
99. 899 
[V. Suffolk phosphate nodules, by Herapath.J 
Water and organic matter 7. 200 9. 210 
Chloride of sodium and sulphate of sodium Trace Trace 
Carbonate of lime 18.514 5.176 
Carbonate of magnesia 0.855 2.016 
Sulphate of lime Some 1.161 
Phosphate of lime t 51.018 45.815 
Phosphate of magnesia Trace Trace 
Perphosphate of iron 8.902 12.476 
Phosphate of alumina 2. 700 6. 387 
Oxide of maganese 0. 057 0. 267 
Peroxide of iron 
Alumina 
Fluoride of calcium 3.161 2.688 
Silicic acid and loss 7.593 14.804 
100. 000 100. 000 
Nitrogen 0.0289 0.0198 
PHOSPHATES OF BELGIUM. 
The phosphate deposits of Belgium belong to the upper part of the 
Cretaceous formation. They are mined almost exclusively in the prov- 
ince of Hainaut, which is the southern part of the kingdom, and bor- 
ders on the French province of Aisne. The following section will show 
the general geologic relations of the phosphate beds of this region : 
Tufeau de Ciply (Ciply Marl) ' \ Craie de 
Poudingue de Ciply (Ciply Conglomerate) > Maastricht 
Craie Grise ou Brune (Brown or Gray Chalk) ' (in part). 
Craie Blanche (White Chalk). 
The top bed, Tufeau de Ciply, is a soft, coarse-grained, calcareous 
rock of a white or light yellow color. It crops out in numerous places 
in the communes of Cuesmes, Hyon, Ciply, and Mesvin, and rests an 
comformably on the underlying beds. In Cuesmes it comes in direct 
contact with the White Chalk (Craie Blanche), but in Ciply and Mesvin 
it is separated from it by a considerable thickness of intervening strata, 
1 In his recent memoir (Quart. Jour. Geol. Soc. London, pp. 325-340, 1886) Mr. Cornet 
expresses the opinion "that the Brown Phosphatic Chalk of Ciply and the Chalk of I 
Spiennes should be regarded as forming together one geological whole, a peculiar stage 
of the Belgian Cretaceous series." — N. S. S. 
(576) 
