258 



NEW YORK STATE MUSEUM 



grained crystalline white limestone, with usually small amounts of 

 impurities. The magnesia content is variable, ordinarily only 2 to 

 3 per cent, but m^ay reach the proportions of dolomite. The fol- 

 lowing analyses show the character of the material. 



Analyses of crystalline limestones of southern Orange county 







I 



2 



3 



4 



5 



SiOa 



} 



■31 

 .26 



2.87 

 5156 

 43-67 

 .006 

 .013 



.48 

 1.62 



1.90 



51^37 

 42^39 

 .005 

 .020 



1.60 



•85 



2.52 

 51.10 

 42.91 

 .005 

 .010 



2.47 

 .96 



3-74 

 48^45 

 42.80 

 .005 

 .028 



1.25 



AI2O3 





FesOs 



•57 



MgO 



2.96 



CaO 



50.08 



42.52 



.008 



.015 



CO2 



P 



S 



I, 2, 3, 4. New Milford, Orange Co. (George E. Wmter's farm). Analyst 

 Bethlehem Steel Co.'s laboratories. 



5 New Milford, Orange Co. Analyst, Bethlehem Steel Co.'s laboratories. 



The main development of the limestones on the east side of the 

 Hudson river is along the Harlem Railroad in Westchester, Putnam 

 and Dutchess counties. In Westchester county the Inwood lime- 

 stone, a white dolomite, has been the source of large quantities of 

 structural stone, furnace flux, lim.e and crushed stone. Farther 

 north in Dutchess county is a belt of white to bluish gray dolomite, 

 worked for marble and lime. Quarries for fiux, lime and structural 

 stone have been worked also at Ossining. 



Analyses of crystalline lisaestouo of ssuthea^tem New^ York 



SiO 



AI2O3.. 



Fe203.. 



MgO . . 



MgCOs- 



CaO.. . 



CaCOs. 



CO2... 



.70 

 1-35 



6.00 



91 .iiO 



n. d. 



.90 



1.38 



86.60 

 n. d. 



2.08 

 •56 



37^79 



58 '72 

 n. d. 



2 



f 

 I 



31 



40 



25 



36 



80 



59 



n 



84 

 d. 





24 





19 





21 



21 



25 



30 



16 



47 



3 



2 



05 



I 



II 





99 



15 



0/ 



34 



63 



44 



II 



■ 70 



•37 



■25 



20.25 



30^63 



" 46 . 66 



1 Sprout brook valley; Frost quarry. FI. D. Gehret, analyst. 



2 Sprout brook valley; Couch farm. H. D. Gehret, anatyst. 



3 White Plains; James O'Connell quarry. Huntington, analyst. 



4. Pleasantville; quarry of Snowfj,ake Marble Co. H. Ries, analyst 



5 Tuckahoe; quarry of New York Marble Co. \'\' 



6 Ossining; Mark's quarry. New Jersey Zinc Co. 



7 Wing dale; quarrj^ of South Dover Alarble Co. 

 company. 



Hillebrand, analyst, 

 anah^st. 

 Analysis supplied by the 



