E. B. Andrews—Lower Carboniferous Rocks in Ohio. 187 
Art. XXIV.—Discovery of a new group of Lower Carboniferous 
Rocks in Southeastern Ohio; by E. B. ANDREWS. Letter to 
the Editors dated Lancaster, Ohio, July 5, 1879. 
I HAVE recently found in Perry County (Ohio) an interesting 
group of fossiliferous rocks between the Maxville Limestone 
(the approximate equivalent of the Chester group of Illinois), 
and the Waverly. In Illinois and along the Mississippi river, 
there are three distinct groups of Lower Carboniferous rocks 
between the Chester and the Waverly or Kinderhook of the 
ey Reports. These are the St. Louis, Keokuk and Bur- 
gto 
groups in Ohio. At one point I have recently obtained the 
ollowing section : 
Maxville limestone, << --0--~-:-.---- 15 to 18 ft., estimated. 
Coarge, sandstone, ~.. 5... aa-s eer nar ase 42 5-sH¥e-+> 2 ft. 
Clay shale, blue and red, ---- - save ag na <a page 8 ft. 
Horizon of nodular concretions, fossiliferous. 
Clhy shale, thie) 2. 252" 30 Be a ae 
Ferruginous limestone, highly fossiliferous, - - -- - -- 15 in. 
Blue clay shale, .--....----- ----------~---- 8 to 10 ft. 
Fi d sandstone (I Istone) U Waverly. 
\ ai 
a o ° / 
At another locality, about a mile distant, I find the same 
Lingu 
Productus, Chonetes, Spirifer, Rhynconella, Phillipsia, Beller- 
ophon, Aviculopecten, Platyceras, Dentalium, and of several 
estern 
the Lower Carboniferous rocks. It is probable that the newly 
found group does not exactly represent any of the groups 
found farther west, but shows the life that existed along the 
eastern shallow margin of the interior sea in which were depos- 
ited the vast calcareous beds of the Middle Lower Carbonifer- 
ous, found along the Mississippi river. Provisionally the 
group may be called the Rushville group. 
