WALCOTT.) 7MMABY NEW JERSEY. 



thinks that if found they would indicate a lower horizon than the Levis 

 formation, probably not far removed from the St. John group and At- 

 lantic Coast series of Nova Scotia, or Lower Cambrian. Details of the 

 lithologic and stratigraphic features of the strata referred to the Cam- 

 brian and their geographic distribution may be found in the reports 

 by Dr. Ells on the Eastern Townships of the Province of Quebec. 1 



SOUTHERN APPAL ACHES' DISTRI 



The Southern Appalachian District includes the outcrops of strata 

 referred to formations of the Cambrian group in northern and central 

 New Jersey, southeastern and southern central Pennsylvania, western 

 Maryland, Virginia, and North Carolina, eastern Ten: northwest- 



ern Georgia, and noitheastern Alabama. 



XEW JERSEY. 



As far as known the rocks of New Jersey referred to the Cambrian 

 are found in the northern central portion as outcrops of a nonfossil- 

 iferous sandstone resting upon Archean gneiss and subjacent to a Mag- 

 nesian limestone that has been referred to the Calciferous zone of the 

 New York section. The greatest thickness assigned to it ia - -et. 



The correlation with the Potsdam sandstone of New York is b< 

 entirely upou the lithologic characters of the sandstone and its strati- 

 graphic position. There is no positive evidence of its being the equiv- 

 alent of the Potsdam sandstone of New York. It may be Lower. I 

 die, or Upper Cambrian, and possibly of Calciferous age. From the 

 stratigraphic conditions to the north and south it will probably be 

 found to be of Lower Cambrian age, or the equivalent of the M Gran- 

 ular Quartz" of New York and Vermont. The lower portion of the 

 limestone series may be of Cambrian age, as in Dutchess County, 

 New York. 



Among the papers presented to the Geological Society of America 

 at its second annual meeting. Decern oer 31. 1S90, was one by Prof. 

 Frank L. Nason on wi The post Archean Age of the White limestones 

 of Sussex Countv. New Jei :i which he describes the discovervof 



the Olenellns fauna in the lower Primal sandstone of Rogers that rests 

 unconformably upon the pre-Cambrian rocks. He said also that fossils 

 (Obolella or Lingulella) extended up into the superjacent limestone. 



In Prof. Nason's collection I recognized Olenellus thompsoni. Obolella 

 or Lingulella sp.?, ami the f a coral-iike organism that is prob- 



ably a sp« f Ethmophyllnm. These were found at Hardistou- 



ville aud Franklin Furnace, Sussex County. New Jersey. 



1 Second report on the gcol o gj of a portion of the Province of Quebec. Geoi. Sv 

 anies, vol. 3. 1889. pp. 1K-120K. 



Report on the geology of a portion of the Kawtrrn Townships of Quebec Geol. Sorr. Canada. le8C, 

 new sor., vol 2, 1887, pp. 1J-70J. 



