GEOLOGY OF THE LUZERNE QUADRANGLE 9 



Dikes of late Precambriari diabase occur here and there through- 

 out the quadrangle. Their fine-grained texture and mode of occur- 

 rence plainly indicate that these dikes are much younger than the 

 great intrusives of the region. 



Two very interesting remnants of the once universally present 

 mantle of Paleozoic strata have been discovered by the writer near 

 the middle of the northern border of the quadrangle. These are 

 erosion remnants separated by miles from the existing widespread 

 areas of Paleozoic strata. 



Glacial deposits, representing the great Ice Age, are widespread 

 over the quadrangle. There are also considerable Postglacial 

 accumulations of sediments, especially in the main valleys of the 

 Hudson and Sacandaga where extensive deposits formed in stand- 

 ing waters held up by the retreating ice. 



A number of faults are positively known to be present, and these 

 have locally notably influenced the topography. Others than those 

 mapped no doubt exist, but in no particular case did the evidence 

 seem to warrant placing them definitely on the map. 



Following are the principal publications which contain statements 

 regarding the Luzerne quadrangle and adjoining districts, as well as 

 certain other papers on Adirondack geology which aid in under- 

 standing the geologic features of the quadrangle. Surprisingly 

 little has ever been published on the geology of the area of the 

 Luzerne quadrangle: 



1842 Emmons, E. Geology of the Second District. Pt 2 of the Geology 



of New York, p. 170-86. 

 1842 Mather, W. W. Geology of the First District. Pt i of the Geology 



of New York, several brief statements. 

 1897 Kemp, J. F. & Newland, D. H. Preliminary Report on the Geology 



of Washington, Warren, and Parts of Essex and Hamilton Counties. 

 I r7th Annual Rep't N. Y. State Geologist, p. 543-46. 

 1897 Kemp, J. F. Physiography of the Eastern Adirondacks in the 



Cambrian and Ordovician Periods. Geol. Soc. Amer. Bui. 8, p. 408-12. 

 1911 Miller, W. J. Preglacial Course of the Upper Hudson River. Geol. 



Soc. Amer. Bui. 22, p. 177-86. 



191 1 Miller, W. J. Exfoliation Domes in Warren County, New York. 

 N. Y. State Mus. Bui. 148, p. 187-94. 



1912 Miller, W. J. Early Paleozoic Physiography of the Southern Adi- 

 rondacks. N. Y. State Mus. Bui. 164, p. 80--94. 



igi2 Fairchild, H. L. Glacial Waters in the Black and Mohawk Valleys. 

 N. Y. State Mus. Bui. 160, several statements. 



1913 Miller, W. J. The Geological History of New York State. N. Y. 

 State Mus. Bui. 168, various statements. 



1914 Miller, W, J. Geology of the North Creek Quadrangle. N, Y. 

 State Mus. Bui. 170. 



