342 New York State Museum 



more. As stated above (p. 340) the Bray man shale has 

 been considered of Salina age and correlated with the 

 Camillus. Recently the conclusion has been reached 

 (Ruedemann '12, '30; Ulrich) that this shale is probably 

 a residual soil of the Ordovician which represents the 

 hiatus between the Frankfort or the Indian Ladder beds 

 (Ordovician) and the Cobleskill or Rondout limestone 

 above (Silurian). It is not directly attachable to any of 

 the Ordovician formations, but overlaps three of them: 

 the Frankfort shales to the west, the Schenectady beds 

 in the Schoharie region and the Indian Ladder beds 

 farther east. 



The Salina beds of southeastern New York begin with 

 the High Falls shale. The Shawangunk conglomerate 

 formerly considered the basal formation of the Salina in 

 the eastern basin (see p. 333) is now believed to be of 

 Medina age by some, by others at least as young as Clin- 

 ton. The High Falls shales (Hartnagel '05) are red 

 shales overlying the Shawangunk in the Kingston-Port 

 Jervis section, with a thickness of 80 to 90 feet. They 

 are pyritic and in places grade up into the sandstone. 

 The name is based upon the occurrence at High Falls, 

 Ulster county. Above the shales in Ulster county is a 

 light colored, quartzite, the Binnewater sandstone (Hart- 

 nagel '05), named from its occurrence at Binnewater, 

 seven miles southwest of Kingston, which has a thick- 

 ness of 32 to 135 feet. South of High Falls the quartzite 

 becomes more calcareous and of a shaly nature. The 

 term Longwood shales (Darton '94), from the Longwood 

 valley in New Jersey, is applied to the red shales above 

 the Shawangunk in Orange county and New Jersey. They 

 are considered, in part or wholly, the stratigraphic 



