100 GEOLOGY. OF OHIO. 
In this section an interesting feature is the appearance of the Fer- 
riferous limestone at its proper horizon. From this point westward, it 
can be found in almost all well exposed sections in which it is due, 
faint at first, but gradually strengthening, its ore increasing more rapid- 
ly than the limestone, but both becoming strong and clear elements in 
southwestern Perry county. 
At Roseville, there are extensive potteries which are established 
upon two beds of clay that belong to the series already discussed. All 
of the horizons have been developed in this vicinity so as to give ex- 
cellent opportunities for measurements, The section immediately about 
Roseville is as follows : 7 
Mi, bay, 
Middle Kittanning Coal, with bone coal (No. 6)......... seseeseseceeee 4 6 
BREE EW 7 5360300000000008.96000000000000000000000008000000000000000000110000000000000 4 
Shalesiwithenodulestoimoren-cescceeees cece Be aes overs 16 
Lower Kittanning Coal (No. 5) (0 to 4 ft)............sesecescrccoccceceseooes 4 
Lower Kittanning Clay—largely worked...............c0scsscssseeeee a 
INItET Val .u:cssoscewawnessewelsteicecocwine sescicieonseaee se sere ce iecrcom cee cence doses 30 
Putnam Hill: Limeston esis. ccs sever seceescncesscisecedececcesaes cccssercerenswess 4 
Brookville ? Coal—Limestone seam—thin.............. PAR e amt eons — 
Tnite rival <3 assesecdescees ddcececsnegerlecswssteccose see tec suseetesecacnesersoses 25 
Tionesta Coal—thin......cicccsscevsseeslies dsisisnmascns savecseutioetecaestececsceuess — 
Mionesta Clay—largelyworkedecscc.coctecceccsscessreteecescccceces 10 
A long and valuable section is found in the Brush creek road that 
runs eastward from Roseville. The ground rises rapidly and the char- 
acteristic Barren Measure strata are soon reached. 
The section is as follows: 
Ft. In. 
Coal—thin. 
TinGenvalec she cas'ssacicevocedes doosenesedeeuteaee saeaetenseteeceesemeteet ects 16 
J STE TOG ISIN) Ore (OT AWIYONC Fa 556506 000000000000000600 600000000000000000000000000 3 
Interval—_-mostly Shales... ic ssscssesageseoosdearcates cemeecoeneoateeemeeen 43 
Timestone— Cam brid Pe’ s.o.:-szcscssces cise cosese ose ee eee ee ee eee eee eO ne 2 
Interval sce. tasecosscessiecccsscucss coaastaye aoseceeeosceon meso ene smeaein 32 
Coal—Brush Creek of Pennsylvania, Salineville Strip Vein......... _ 
Shale sre dy ees h eee cess Sasi aint sulegcateulone notte seaeee ee aoe ene 10 
Shale Retehenccasecsevessucersessedceccccve edenusescnene seen es Oneoe eR Sosa 28 
Coal—Upper Freeport—“ Basin Vein ”’ 0 (RO) CS Sitms (UNIO (/)Jadooce gosiocon0 1 
HiNC=ClAVsecccccacccsecesec cesses toec cess stress tiers nenceceAee eee 2 
Timestone—U pper: Free port..............-cscssvsscecsvseccscecontbedoceconaceses 3 
TM GEnValasccs soswoseesioceeceiesseuowesesasdecesioscuwesecvsieeldarsetecemeactentes 20 
SAMAStONS? scarasccccoconddacccuccaaes see caeas ves Me ocee ee yao C eRe een 15 
Coal—Lower. Freeport—thin .............ss.cecscsecsoeees coud de seseanelneens .— 
Interval—concealed ...... {90000000 000L00 SoOBOO HUES .60c0988000005 Scagnnte AU) 
Coal—Middle Kittanning (No. 6) ............0 Se hee lecs Bosooonocadone0, a 8) 
