304 



C. N. FENNER 



Another example of variations in strata is shown in Fig. 3, a section 

 at Pope's old quarry, near Garret Rock. TJiis is a sketch of the 

 west face, north end of quarry. Marked variations of the strata 

 show themselves along the quarry face, and the section shows no 

 resemblance to any part of Fig. i or Fig. 2, though less than a mile 

 distant and at the same horizon (just beneath the trap sheet). 





** 1 





"■'f/t />,cAi,Jt.t, 





F/g. 3. 



At Thomas' quarry at Albion Place there is an instance of the 

 complete thinning-out and disappearance of a sandstone bed, prob- 

 ably five feet thick at its maximum. This is at the northern end. 

 High up on the western wall a massive bed of sandstone has several 

 feet of its upper part cut sharply away at one place, and shales abut 

 against it. 



These examples show the great tendency of the strata to vary in 

 a large way, and are inconsistent with any form of marine deposition, 

 or of any theory of deposition which does not take cognizance of 

 sharp changes within small areas. When we take up the considera- 

 tion of smaller details of structure we are met again with proofs of 

 this same tendency to variation, as is shown by a study of the smaller 

 features of the shale, sandstone, and conglomerate beds. 



