rl4:8 NEW YORK STATE MUSEUM 



tinctions between the formations are evident. Tlie Pine Hill 

 formation is 250 feet thick in New Jersey, according to Darton^ 

 thinning northeastward to 5 or 6 feet at Cornwall. 



Longwood red shales 

 Darton applied this name in 1894 to the series of shales over- 

 lying the quartzite last described. The formation, in Pine hill, 

 shows a thickness of 75-100 feet, and is of considerable (local) 

 economic importance. The shales are in general red, occasional 

 bands of olive shales locally occurring. 



Cornwall limestones 

 A series of thin beds of limestone overlies the Longwood shales 

 at several points in Orange county. These beds carry fossils 

 which serve to correlate them paleontologically with the Lower 

 Helderberg and Waterlime rocks farther west. The term 

 " Cornwall limestones '' is not here proposed as a formation 

 name, but is used merely as a convenient designation for the 

 series till further field work shall have decided the extent to 

 which subdivision can be carried. No quarries are at present 

 worked in these limestones. 



Newfoundland quartzite 

 This formation, usually a light colored quartzite but locally 

 conglomeratic, carries at some localities fossils which would 

 correlate it paleontologically with the basal Devonian Oriskany 

 quartzite. The formation name here proposed is in allusion 

 to the exposure of the quartzite at Newfoundland N. J., where 

 its lithologic and paleontologic characters are well shown and 

 were described by Britton and Merrill in 1886.^ It is exposed 

 at several other points along the margin of the Devonian out- 

 lier in both New York and New Jersey. No quarries in this 

 formation are worked in the area under discussion. 



Monroe shales 

 This name was applied by Darton in 1894 to the dark colored 

 shales underlying the Schunemunk conglomerate and in places 

 overlying the Newfoundland quartzite. Fossils correlate them 



^N. J. state geol. Rep't. 1886. 



