-o THE STORY OF THE EARTH. 



■ w k, a mud which consolidated 



into it often 



marked by differei colour. Welsh si, 



lOQtain clay pebbles, such as occur at 



the present day on shores where the cliffs are of 



.v. Many s'.ates contain fossil remains 



tnimals which lived in the sea when the old 



mud was accumulating. Those fossils are often 



>rted and squeezed into half their original 

 breadth <>r length, showing that the whole moun- 

 tain mass has undergone compression and Con- 

 densation. The compression has bent tl.< 

 into synclinal troughs and anticlinal saddles. 

 The most developed in the trou. 



■ f this lateral pressure has been in 

 the first place to turn the films of water contained 

 . the particles Of the old mud at right 

 lirection from which the | 



came. The resistance offered by the rock tra 



formed part of the motion imparted to its 



^ into heat. That heat raised the- temper- 

 ature of the water contained in the rock, enabling 

 i film, under the pressure, to dissoh 



the- mineral matter in which it was 



slaty toi ks oft« 

 of having 1 tured through their thicki 



^locations, and subsequently re-united. 

 h breakage, relieving the pi - . would ca 



the • fall, and the siil>Ma:,< is winch 



had lived then in mil 



films, paral hout 



the mountain D . . d having DO I elation tO 



in whieh the mud w B 



tal films resemb min- 



or chlorite. They impart 



