FIFTH REPORT OF THE DIRECTOR I908 



171 



greater than the clip of the rocks, but finally falls again 

 below the dip, as in the Chaumont inlier where the brook 



Fig. 9 Three Mile Bay inlier (1) and Thres M ile Creek inlier (2) in Jefferson 



I Black River limestone. 



county, N. Y. 

 Scale 1 m. = 1 in. 



Lowville limestone. 



reaches the backwater of the lake. 1 It follows from this descrip- 

 tion of this group of inliers that we can expect to find them only 

 where they follow the dip o£ the rocks, i. e. in New York, in 

 general in north-south flowing rivers. Among these there occur 

 some very interesting examples of erosion inliers, and more will 

 undoubtedly become known as accurate and detailed mapping pro- 



1 Taking this explanation of this inlier as granted, and also the post- 

 glacial age of the brook, then it follows that since the lake water is now 

 backing up into the inlier, the lake must have been rising relatively to the 

 land since the formation of the inlier. 



