CLINTON GROUP. 
17 
oolitic than that below, and with fewer concretions, and usually has less carbonate of lime intermixed. It 
appears at Wolcott furnace, and is apparently the bed wrought six miles further east. 
5. A limestone similar to the more calcareous portions of No. 3; ( and, at Rochester, containing few fossils 
except crinoidal joints : it is usually thinbedded, the layers separated by shale. It contains numerous 
cavities filled or partially filled with sulphate of lime, sulphate of baryta, iron pyrites, etc. From its si¬ 
tuation as the separating mass, it partakes also of the character of the next succeeding group. The Niagara, 
however, being so well characterized, and the Clinton group an acknowledged variable one, it is thought 
better to place it with the latter. 
The same essential order in the parts of the group appertains to it in several localities in 
Wayne county, but west of the Genesee river two or more of its members are wanting. The 
shale and calcareous matter seem equally persistent, but both gradually diminish westward. 
Section on the Genesee river, from the upper to the lower fall at Rochester. 
1,2, 3. Upper, Middle, and Lower falls. 
g. Shale of Niagara group. 
f. Upper limestone of Clinton group, j 
e. Upper green shale. [ 
d. Pentamerus limestone. j Ccintc 
c. Lower green shale. 
b. Grey band, upper part of Medina sandstone. 
a. Medina sandstone. 
1. Section of the strata one mile south of Medina. 2. Section showing the Clinton group and associated 
strata at Leiviston, on the Niagara river. 
g. Niagara shale. 
f. Upper limestone of Clinton group. 
e. Place of the upper green shale : no rock seen. 
d. Pentamerus or lower limestone of Clinton group. 
c. Lower green shale of Clinton group. 
b. Terminal gray mass of the Medina sandstone. 
a. Medina sandstone. 
e. Niagara shale. 
d. Limestone, formed by the junction of the lower and 
upper limestones of the group. 
c. Lower green shale of Clinton group. 
b. Terminating gray portion of the Medina sandstone. 
a. Medina sandstone. 
*** The three last preceding sections are taken from the Report for 1843, pp. 59, 78 & 79. 
[ Paleontology — Vox,, n.] 
