176 G 5 . REPORT OF PROGRESS. I. C. WHITE. 



This is the only township of Wayne in which any of the 

 Coal Measure rocks occur ; along its extreme margin, in the 

 vicinity of Forest City, the great canoe shaped northern end 

 of the Third Anthracite coal basin dips down far enough 

 to allow the Pottsmlle Conglomerate to be caught on the 

 western slope of the Moosic mountains, the contour of which 

 conforms to the dip of the Conglomerate. 



Thus the rocks of this area extend from the base of the 

 coal measures down into the Cat skill including whatever 

 there may be of Mauch Chunk and Pocono. 



Owing to the direction of the principal streams no ex- 

 posures of these latter formations can be seen in detail any- 

 where within the township ; for on the western slope of 

 the Moosic mountains the tributaries flow directly westward 

 into the Lackawanna river, and thus follow down the de 

 scent of the rocks just as fast as the Conglomerate dips, 

 but never cutting through it ; while to the east the rapid 

 rise of the strata shoots all these measures into the air long 

 before the eastward flowing streams have had a chance 

 to expose them. Hence along the crest of the Moosic the 

 Mauch Chunk, and most of the Pocono measures come to 

 the surface under great piles of debris which effectually con- 

 ceal all but the lowest members of the latter. 



Gris wold's Gap, in the Moosic mountains, lies directly 

 east from Forest City, and west from White Oak pond ; it 

 is cut down 200' to 300' below the adjoining highlands and a 

 stream passes from it westward into the Lackawanna river. 



In descending the eastern escarpment of Moosic from Gris- 

 wold's Gap the following section is exposed : (Fig. 48.) 



Moosic Mt. Section. 



1. Griswold's Gap Conglomerate, (base 1975' A. T.,) . . . 35' 



2. Concealed, 50' 



3. Sandstone, massive, gray, 15' 



4. Concealed, 25' 



5. Sandstone, grayish-white, 20' 



6. Concealed, 30' 



7. Sandstone, gray. ... 15' 



8. Concealed with occasional showings of gray sandstone 



and red shales, ... 200' 



9. Pebbly sandstone, {Mt. Pleasant conglomerate?) (1700'), 20' 



410 



