3EU1I 



Is which the limestone ledj 



limestone bears a high 

 r the manufacture of lime, but also as a 

 fun 



of the burned stone used for flux 

 . 



07.48 



Id 1.1 



A umina 14 



: 12 



Silica 70 



a] 00.53 



Columbia county 1 



The Hi In the eastern part of the county are of little 



inij D account of their iii. pure nature, but on Becraft 



untain i .' Hudson the stone has been extensively quarried 



a Dumber of to supply the furnaces at Troy with flux. 



one are found here, viz the Becraft or Scutella 



lini' . and the blue Pentamerus rock. 



e is quarried on the cemetery prop 



ilif northeastern edge of the town (pi. 32). It is well ex- 



: n a face aboul 100 feet long and 2." feet high. With the 



6 feet the layers are quite free from chert. 



tonal cavities with calcite crystals and at 



times quart/, but otherwise prol ably does not run over 3# or i£ in 



While tin- - has hitherto been used only for road 



source of limestone for the manufacture 



P . the necessary clay being obtainable from the 



abundant ; :) 1 is the Becraft limestone already 



I tending along the top of the ridge arc a Beriea 



: ''• ' fossiliferous limestones of Columbia county 



v '' Hudson river Bhales and the laconic Bystem 



W. W. GeoL 1st disk K. V. 1843. 



