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Indiana University Studies 



Tables No. 4, 5, and 6) show the loss in the formation of the 

 clays of the stylolite-seams, assuming the clays to be of re- 

 sidual origin. One finds, in making a careful study of this 

 comparison, that the loss of the various constituents in the 

 stylolite-clays is in direct accord with that in the transforma- 

 tion of a limestone to its residual product. If the stylolite- 

 clays were of sedimentary origin, one surely would not ex- 

 pect this relationship to exist. 



TABLE No. 7 



Table for a Comparison of the Percentages of Various Constituents Lost 

 in the Transformation of Limestones to Their Residual Clays. 



Compiled from Column V of the preceding analyses, Tables No. 1-6. 



Constituents 



Residual Limestone 

 Clays 



Clays 



of Stylolite— 

 Seams 



Table 1 



Table 2 



Table 3 



Table 4 



Table 5 



Table 6 



Silica (SiO,) 



0.00* 



27.39 



0.00* 



11.70 



0.00* 



0.00* 



Alumina (AI0O3) 



11.35 



0.00* 



8.60 



0.00* 



2.70 



9.10 



Ferric oxide (FeaOg) . . . 1 



89.56 



24.89 



17.30 



71.70 



23.90 



11.10 



Ferrous oxide (FeO) . . ./ 















Lime (CaO) 



98.93 



99.83 



96.84 



93.20 



93.40 



87.70 



Magnesia (MgO) 



89.38 



99.38 



Gain 



86.20 



96.70 



86.40 



Potash (KoO) 



66.37 



57.491 





41.40 



51.50 





Soda (NaoO) 



53.26 



76.04] 







Carbon dioxide (CO2) . . . 



100.00 



99.15 



86.52 



92.90 



95.10 



87.50 



Water (H.,0) 



41.63 



Gain 



Gain 









Volatile and combustible 

















20.20 



61.00 



24.30 











*Taken as constant. 



Since the per cent of soluble constituents in the limestones 

 of Tables No. 4 and 5 is very high, one would expect a large 

 proportion of the parent rock to be lost when decomposed. 

 The calculations show a total loss for the entire rock of 91.50 

 per cent and 91.135 per cent (column III). These samples 

 were collected from the same quarry, but from different 

 stylolite-seams. Thus, the figures show that solution affected 

 both limestones equally. Such would be expected. Since less 

 than 9 per cent (by weight) of the limestone is saved, it is 

 readily seen that a considerable amount of decomposed lime- 

 stone would be necessary to produce a small deposit of residue. 



