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NEW YORK STATE MUSEUM 



of Albany, showing well the overthrust of the Cambric rocks over 

 the Lower Siluric [text fig. 34]. 



Fig. -4 Diagram section Siiovving the relational the Lower Cambric lime- 

 stone (B, C) and shale (A) to the Hudson shale '(Oh) as exposed at the local- 

 ities near Schodack Landing in Rensselaer county. (Copy from Dale) 



We also refer in this connection to the section from the Rome 

 (Ga.) folio, inserted here as example of overthrust inliers, as 

 showing that extensive overthrusts of like character as the one here 

 assumed are actually known to occur in the southern Appalachians. 



If Dr Ulrich's and the writer's conception of the structure of the 

 slate belt is correct, the belts of " Hudson slate " between the 

 Stockbridge limestone and the Cambric at the north end of the 

 Taconic mountains are most probably wedges between thrust faults. 



There have been distinguished, altogether, 14 kinds of inliers in 

 this essay, which are of very different importance. They may be 

 grouped as follows: 



f 1 Deposition inliers, resulting from burying by 

 newer strata of 

 a original outliers 

 b erosional irregularities of surface 

 c lenses and reefs 



Caused by 

 action of 

 water 



2 Erosion inliers, comprising those resulting from 

 a corrasion — ■ corrasion inliers 

 b solution — " sinks " and " coves " 

 c glacial erosion — glacial erosion inliers 



