^s 



ILLUSTRATIONS OF THE 



lar ilratum, and not on thofe 



and. as th 



th 



that are contigu- 

 ilrata of any kind 



hich the quartzy and fil 



are not 



ntermixed. fo there 



f 



ble 



confolid 

 We nee 



IS 



d 



as 



which the ig- 



thus rendered proba- 



ng, however, on this 



foilils of every genus may be 



a 



argument, 



fhewn to fpeak diftindly for themfel 



23. Thofe 



f th 



calcareous genus d 



perhap 



more 



a 



gly th 



th 



a 



fo 

 yet 



even among them there are many fads, that, 

 though taken unconneded with all others, are 

 fufficient to eftablifh the action of fubterraneous 



fire. 



Such, for example, are the calcareous 



breccias, compofed of fragments of marble or 



I, i 



limeflone, and not only adapted to each other's 

 lliape, but indented into one another, in a man- 



r 



ner not a little refembling th^ futures of the hu- 



man 



From fu 



ft 



ces, It is im- 



poffible not to infer the foftnefs of the calcareous 

 fragments when they were confolidated into 

 one mafs. Now, this foftnefs could be induced 

 only by heat ; for it rauft be acknowledged, 

 that the a6tion of any other folvent is quite in- 



ening of large fragments of 



adequate to the foft 



ftone, w^ithout diffolving them altogether. 



24. In many other inftances it appears cer- 

 tain, that the ilones of the calcareous genus 



have been reduced by heat into a ftate of flui- 

 dity 



