GEOLOGY OF THE LUZERNE QUADRANGLE 5I 



Morainic Deposits 



Typical morainic deposits, mostly till or ground morainic ma- 

 terials, are common throughout the quadrangle, though usually they 

 are more or less associated with stratified or fluvio-glacial materials. 

 True boulder clay is seldom seen. Morainic deposits are particu- 

 larly well developed over the lower lands or valleys, while on the 

 hills and mountains they are relatively thin or absent. It is evident 

 that, during the retreat of the great ice sheet, the burden of 

 morainic material was largely dumped in the valleys either by direct 

 deposition by the ice, or by water in connection with the ice, or 

 both. Morainic deposits of this kind have been piled in the valley 

 of Stony creek to such an extent for 5 miles from Stony Creek vil- 

 lage westward that only a few scattering outcrops of the older 

 rocks are anywhere to be seen. The bedrock of the western part 

 of the valley has been so effectually concealed by heavy morainic 

 deposits containing many boulders that it has been necessary to map 

 that area as Pleistocene. Heavy morainic deposits with many 

 boulders also cover the valley between 2 and 3 miles southwest of 

 the top of West mountain; the middle part of the sunken fault 

 block between West mountain and Hadley hill; much of the higher 

 land mapped as Pleistocene north and northwest of Corinth; the 

 valley between 2 and 3 miles east of Gailey hill ; the valley of Roar- 

 ing brook between 2 and 3 miles west-southwest of Stony Creek 

 village; and in the general vicinity of High Street. 



Kame-morainic deposits, often with knob and kettle structure, 

 are well represented between 2 and 3 miles south of Hadley, i 

 mile west and northwest of Hadley, in the valley east of Gailey 

 hill and east of Warrensburg. 



Morainic deposits are of course also more or less well developed 

 in many other parts of the quadrangle. 



Very few boulders of anorthosite carried by the ice from Essex 

 county were observed, the most interesting one perhaps lying on 

 top of the granite ridge at an altitude of 1300 feet, 2 miles south- 

 east of Stony Creek station. 



Within and south of the two areas of Paleozoic strata near High 

 Street there are thousands of more or less angular fragments of 

 sandstone and dolomitic limestone of all sizes up to several feet in 

 length. 



Postglacial Uplift of the Quadrangle 



Before proceeding to a discussion of the glacial lakes and their 

 deposits, attention should be called to the well-known fact that, 



