362 BULLETIN OF THE NEW YORK STATE MUSEUM 



permeation of Iron. Carbonate of lime also appears to be 

 one of the results of decomposition. The cementing mate- 

 rial is chiefly iron, with some carbonate of lime. 



Sandstone, Gilbert Brady & Company, Albion, Orleans 

 County.— The principal mineral constituent is quartz. There 

 is, however, much kaolinized feldspar, some granules of 

 hydrous oxide of iron and a ''dirty," interstitial matter, 

 probably fine quartz and iron-bearing clay. The cementing 

 material is partly carbonate of lime and hydrous oxide of 

 iron, the latter predominating. 



Sandstone, Hulberton, Orleans County. — This stone cannot 

 be distinguished from the Albion, excepting that the former 

 is a little coarser-grained. 



Sandstone, Portage Bluestone Company, Portage, Wyoming 

 County. — Minerals: quartz, feldspar, micas (?), oxide of Iron. 

 The quartz Is filled with minute cavities, holding liquids and 

 gases. It occasionally seems to 'be porous as the cavities 

 are stained with oxide of iron, which comes from the cement- 

 ing material. The feldspar is not fresh, but kaolinized, 

 carbonate of lime being one of the resulting products. The 

 mica appears In minute scales. The cementing material is 

 largely carbonate of lime, hydrous oxide of iron being next 

 in proportion. In dilute acid the grains of quartz fell apart 

 generally. Some of the granular carbonate of lime Is prob- 

 ably secondary matter from the feldspars. 



Sandstone, Olean Bluestone Company, Olean, Cattarau- 

 gus County. — Resembles closely the Portage sandstone, 

 except that It Is coarser-grained, has more iron, and the few 

 scattering scales of mica (?) are so far decomposed as not to 

 be identified with certainty. 



Sandstone, Kibbe, East Longmeadow, Mass. — Constituent 

 minerals are quartz, feldspar and hornblende (?). The quartz 

 is in fine grains and rather free from inclusions. The feldspar 

 is almost wholly decomposed and stained more or less with 

 iron. Occasional crystals of a mineral which looks like horn- 

 blende occur. Iron is the principal cementing material. 



