144 



REPORT OF THE 



DESCRIPTION OF ROCKS, &0. 



: Common Alluvion." 



• Plaster Clay. " [" Marly. ' '— Houghton.] 



■ Common beach sandy with coarse gravel." 



Compact limestone." [Probably Helderberg and Onondaga salt group 

 together.— W.] 

 " Gypsum and Salt." 



; Compact Lime." [Probably Niagara limestone.— TP.] 



II.— State Salt Well, Grand Rapids. Sec. 3, T. 6 N., 12 W. 

 Condensed from the records kept under Dr. Houghton's direc- 

 tions. Bored in 1841-2. 



