134 



GEOLOGY. 



Fig 57. 



have sand rock, at d one kind of limestone, at a another 

 kind, and the same as that on which the brown clay, e, 

 lies ; at g is slate rock, at h are shales, and at I red sand 

 rock ; at k is debris from the sand rock, , and at i is a 

 cranberry meadow lying on peat. Sometimes the strata 

 in the upheaval become vertical, as seen in Fig 58, which 

 is a representation of vertical 

 strata on which a castle has 

 been built. These strata were 

 laid down horizontally far back 

 in the past, ages upon ages be- 

 fore man was introduced, and 

 then by some mighty upheaval 

 were raised to their present po- 

 sition. Sometimes strata appear to be horizontal when 

 they are very far from it. Take such a case as that pre- 





Fig. 5l>. 



sented in Fig. 59. If the spectator were in the vessel, so 

 as to look at the rocks as they appear on the sidep, the 



