m:w FORE mam liUSEUlf 



arc two cement beda in the YVhiu-port-Rosendale region. 

 :• one i in thickness, and the 



• in thickness, with an intervening mem- 

 - of waterlime beds, but these thicknesses are 

 \ High falls the apper bed is 15 feet thick, the 

 Lou ' thick with -°> feet of intervening beds of water- 



lime rock. The High falls arc over the thicker beds. 



ment may be looked for in the 



upp< • Rondout valley, from Port Jackson to Ellenville, but, 



sence of outcrops, this should only be regarded as 



Around B ale the cement industry is developed to an 



t, many thousand barrels of cement being 

 produced annually. Detailed mention of the cement manufacture 

 i> made in another chapter of the report. 



ill be said in this part of the report concern- 

 the R< n-ndale cement rock, as it is mentioned more fully in 

 the chapter on natural cements. 



Coralline or Niagara limestone forms a thin bed underlying 



cement at Rondout It is a dark gray limestone of variable 



thickness. Under the cement at Rondout it is 7 feet, but at the 



to the Becraft limestone quarries 1 mile north of East 



Kingston it is only 5 inches. 



Warren county 1 

 h the Calciferous and Trenton are known in this county. 

 The formi tot of very great importance except for building 



purposes, but the latter is very prominent. 



he Trenton limestone (pi. 72) has been quarried 



a inui il er of years for lime manufacture, and the product 



xcellcnt rejmtatir.il. There arc four companies operating 



lime quarries, but the rock in all of them is very much the same. 



The section in the quarry beginning at the top consists of: 



Feet 



Thin 1 •■ . impure black limestone 12-15 



ive Mack limestone 2- 3 



. black, crystalline limestone 15 



I. 2d diet X. V. 1842. p. 170. 



