206 J. M. Safford on the Upper Silurian Beds of Western Tenn. 
The object of this article is to point out the fact that the fauna 
pammasted i in the above work is not the only one occurring upon 
2. He eke not a little confusion has existed with 
ence to the different beds of this pire To this day, so 
p , 
flat lands ae east. The beds are arranged in descending 
order, The term Niagara is mate to include both the Clinton 
and Niagara groups of New Yor 
9. Top of ridge es the valley of Eagle 
Cannontrerovs. Strata concealed ; loose cherty masses scattered — ye 
aaa ning ’ occasional fossils, 53 feet 
“~ a (when weathered) bluish or greenish siliceous 
“ib shale Hight feet at the base interstratified with thin, 
fine-grained sandstones which are charged with indi- 
5S rl group? ae of a small Lingula, 42 feet. 
7. Fine-grained erm highly charged with the same 
eae as anager 
nen ipo: tone—Fossils obscure at this point, 
j iret ag - {si ae horizon,  howeeer of well marked Lower Helderberg 
4 rocks siiar points in Wayne county, 25 feet. 
4 de-forming pawchest and Caleareous pha 
es Sponge Bea limestone grey often coarse crinoida j—soretiein ag illaceo 
‘ ing Bed. er Met “ssliferous—occasionaly containing layers of 
¢ i. 90 
& Ni. pagers, | the ( 4. Vari shat Limestone ; brownish-red and grey layers 
Variegated interstratified—man ny layers argillaceous—orthocerata abun-, 
\ Bed. C er part, 96 feet. 
a 
Greenish calcareous Shale, ve ipiore Leptena sericea, 
ied Strophomena alternata, 15 fee 
2. Blue Limestone in rough thick-bedded layers containing 
Stro ena alternata, 8. tenuistriata, Rh 1d 
Lower Sriurran. hy ees a, Cyclonema bilix, Col sllata, &c. 
eet, 
Limestone—in thin th la 
separated ated ealy or been used a “Saydrai 
b= ay Lingulee, 7 Trilobite, ty TO feet, 
The beds numbered 4, 5, and 6, represent all the glade-form- 
ing limestones and shales, and it is to these that attentige. is 
especially invited. In this art of ee county, their entire 
thickness is seen to be 211 fe 
