I i i : i THE EAR! II. 



fed with the black I 

 named basalt. 



id with I 



I mud which undei 

 I 



CHAPTKR III. 

 THE MATERIALS OF MOUNTAIN CHAI1 



'I'm. same cause which produced the local heat 



ami fractures which led to volcanic outbursts, has 



led the earth's crust. Rocks many thousands 



• hick have been bent, folded and crumpled, 

 which is shown in the SU< 

 »Cks <»n the surface of < 



ed saddles and troughs, is most astounding 



its intensity in mountain chains. The uphea \ 



of the parallel ridges of limestone rock known as 



• irming the fronti< 



Swil . I and Ft a beautiful examp. 



troughs wh a valleys, partii 



• her, In that part Of the \ 



from th( v down to 



tun.' d, in ti - Iding by 



ral dis: :it j wl. 



which lifts mountai 



tion 



to 



allel ra: 'cm 



