394 DAKTON — GREEN POND, N. J., TO SKUNNEMUNK MT., N Y. 



rocks, and also the Green Pond conglomerate, for its materials appear to 

 have been derived from both of these sources. Possibly its quartzite 

 pebbles were not derived from Green Pond beds in this basin, but came 

 from other regions. The original thickness and extent of the Skunne- 

 munk conglomerate is not known, for it has been deeply eroded. 



Whether the several Upper Silurian and Devonian members originally 

 extended continuously to the great areas to the north and Avest is not 

 known, but from the similarity in characters and faunas it is supposed 

 that they were deposited in inlets of the same general water areas. 



