EXPLANATION OF THE PLATES. 



Fig. 4. Is intended to represent the probable confusion which exists at the 

 junction of the stratified with the unstratified rock. The drawings of the 

 actual appearances at the JMUctions which are visible, will show that there 

 is abundant ground for such an imaginary section. 



P L AT E 21. 



Fig. 1. Represents the actual superposition of the rocks at the Criny, serving to 

 justify the ideal sections which have been already given. The rocks being 

 inaccessible are not however measured. Other indications of a similar 

 order occur in different places, but I thought it unnecessary to represent 

 them. 

 'Fig. 2. Is intended to represent the probable appearance of the strata had they 

 been deposited on the granite. Since the same beds of quartz rock, schist 

 and limestone, are parallel among each other, they should if they had been 

 thus deposited been also found parallel to the granite. But the actual 

 appearance is shown in 



Fig. S, Where the strata, sometimes of limestone, sometimes of quartz rock, 

 sometimes of schist, are found in contact with granite. 



PLATE 22, 



Represents the extraordinary fact occurring near Gow's bridge; the interference 

 of beds of hornblende, schist and marble. 



PLATE 23. 



Geological map of the South- Western Part of Somersetshire. 



P L A T E 24. 



Fig. I & 2. Represent the seeming alternation of red raarle and lyas on the coast 



of Somersetshire. 

 Fig, 3 & 4. A map and section of part of Lincolnshire. 



PLATES 25, 26. 



Lord W. Seymour's Clinometer. 



