70 G 5 . KEPOET OF PROGRESS. I. C. WHITE. 



is only 100' above water level=1050 / A. T. ; and at the State 

 line beneath the river bed ; nor is it seen again as far as 

 Pike county. 



On the Bradford county line its outcrop lies about 200' 

 above the bed of Wyalusing creek. * 



In the southwest corner of Susquehanna county flagstone 

 quarries have been opened in greenish-gray layers from 2" 

 to 4" thick, the flaggy stratum being seldom more than 20' 

 thick. 



Many plant fragments occur at the quarry on Tuscarora 

 creek, \\ miles west of Skinner' s Eddy, 240' above Susque- 

 hanna water-level. 



New Milford red shale (17), 100' to 120' thick.— This de- 

 posit, concealed at New Milford, shows just south of the 

 village, and is finely exposed along the D. L. & W. rail- 

 road half way to Montrose depot, as a deep red shale, with 

 occasional sandy layers, in which are irregular deposits of 

 calcareous breccia. Along Stamcca creek the formation 

 has very few red layers, but consists almost entirely of olive 

 and greenish shales. In Wayne county the formation is 

 everywhere beneath water level. 



Starucca olive shales (18), 105' thick. — These olive, or 

 greenish shales contain numerous thin sandstones at short 

 intervals, and is topped in some places with one more mas- 

 sive. The only good exposure south of the State line is 

 along Jefferson Branch railroad above Starucca bridge. 

 But the whole series (with the red shale above it) is per- 

 fectly exposed along the Erie railroad, in the Summit cut, 

 on the divide between the Susquehanna and Delaware rivers. 



General observations on J\ T o. IX. 

 1. The thickness of the Catskill formation, got by addi- 



*The New Milford group as a whole occupies a large area in eastern Brad- 

 lord county which on the geological map is wrongly colored Chemung. 



