90 GEOLOGY OF OHIO. 
already given are conclusive and fully confirm the reference of the Cam- 
bridge coal to the Blackband horizon, as made by both Stevenson and 
Andrews in their reports upon the district. 
The section has been extended downwards by the records of the 
salt wells bored in this same district. Andrews quotes the record of 
salt well No. 2, on the Scott farm (Geol. of Ohio, vol. II, p. 534). 
This record is introduced here and interpreted in accordance with 
the general section that has been traced directly to this point from the 
Tuscarawas Valley. It is as follows: ea 
1. Level of the Cambridge (Upper Freeport) coal. hea 
Be. SOUS Cte eica si se teavse. seescded ee teesaucuuets ec ceuione se econ caraenaeenecaceee ees 18 
Be - GYAY SANG-TOCK -. sein ccusetavsnecsnesneseccsececoeseecsoeea ees erence 32 
A” NOt KNOW svccacesscccsecossees sos tecessescenscsetnemasocnccccuecteneccecns ss 10 
5: Coal’(Lower: Freeport) tc.c.2.2.0.<c.. core -csconntecccecenc seeeeeneneses a 
65, Bire-clays (Lowereh ree pont) sacecccssscsccecceeneceonesioeaeeecaccs 3 
Ufo MiboaVeysqrayays) (QU O\,KEIe IOREXEFOLOVAB)) 5e0000000000000500000000000000000 000000000 1 6 
8." SORPSEONGE wivccs csceecsctucce ssn csomen tren toes. asocnccccumeteeeocateanace sce 6 
SS Shalevandstine=-clayanccccdecssccsrese nin seveuincescebionossrsentactes essere: 26 
10.) Black slates. & cee esee 5 Gees c caeaae eee laste tesa tesclencmeeracesselioneeeites 10 
1 ie) 80:1 eee RR OBR On Ren TE CC SocHenacnODEEocu aca craacandc GOG00e ooboub psecoo dbus ce5006 12 
128 Coal] Wipperskattanmings2) hac. eeceeee ee mencoceecncnccececaes 0 10 
13. “SOAPStONe: 22, ..cwoss edocs swccsescosetes cose rosteeetetonsaceenecwocricecmesens 40 
WAR) (Chay (MU EIGN Key GTR NOTANT AYER) 5.4460060096%00000006000800000006 4000000026" Lame 
1530. White fire- Clays siisii2. iene So Sp S, oeaeeaneeawecinotne ten secldis 5740) 
16. ,Blue/sandstone; oill Tock: <. [0.64065 2. use wolscenconse asconseosececcoss 44 
Ve Blacks shale wa..cicit.scusconssosaeecen so depmee seeseoiscties scence cease estins 31 
SS ehimestonen@autn ampli) eeeereemetecsceoscs SOLO OLE 0 11 
TOM Sal Ow. ob. l sci cctv esieaaiess woseunis one ieweue ieee act netecsee ma eeoemecemmeee 14 
20: Tronfore; very Dard’)... 2.00. cc.cc.secsccccccoascossnectecoeseiesen noses ee es 1. 6 
Ble (SHAlLSi ii Shen cecesenecevsceces covsesessseecs os etesscsemescseencemeneccneneatens 69 
22: Hard, black rock. ..scscs esa sacessecsoue conooenesee Cane cemene comerosesoaces 6 
QB; SHAS... Ai os vecece suns scchoa vesehe aee toneecsceewecseminte teceinceeceecconeeates 80 
24, Stratum charged with sulphuret of iron ............c......0. see 3 
205, Lnterval Mot TECOrGed 2 .0.c.cccsececes nec cwsctcc sete eee mete scecete: 215 7 
265 Wihhiteisand-rock %.c 0. .cscececosecccceceh coecscustiecsses come anecneceseence 40 
The intervals will be seen to be as follows: From Upper Free- 
port coal to Lower Freeport coal, 60 feet ; from Lower Freeport coal 
to Upper Kittanning (?) coal, 58 feet, and to Middle Kittanning (?) 
coal, 99 feet; from Middle Kittanning (?) coal to Putnam Hill lime- 
stone, 96 feet. 
Another obvious construction of the two lower coals is to count them 
the Middle and Lower Kittanning coals, respectively, instead of Upper 
