STRATIGRAPHICAL ORDER. 81 
Ft. In 
9. Limestone (flinty)—Upper Mercer ...............ccsceescscseceereceeves 3 
10. Coal—Upper Mercer, No. 3 ...............ssccssecccscccsssrevcssccscscece 0 6 
11. irngervalycomeeall dirtiest escocsscctcccstens dee celsleks cvssecsseicevevs cess cee 21 
12. Limestone—Lower Mercer, Zoar or Blue..............ccoccecssecceees 3 
lSwenCoal—=—Wower Mercer NO jai ccecccccsgsescselcsscnceossccsese Gene sdeck 0 10 
The section needs but little remark. The Tionesta coal No. 8 is 
not usual in this immediate neighborhood, but it is one of the regular 
seams of the district. The Lower Kittanning or Mineral Point coal is 
wanting for quite an area about New Comerstown, and the interval 
between the Putnam Hill limestone and the Middle Kittanning coal is 
somewhat smaller than is generally found. 
Following the railroad southward from the Tuscarawas Valley, 
this last-named coal seam is shown in the approaches to Tunnel No. 3, 
and is worked in numerous small mines along the line. In particular, 
it is opened by John Booth in the neighborhood of Bird Run Station. 
Several borings have been made here, and all strike the Putnam Hill 
and Lower Mercer limestones at the same intervals found on the north 
side of the divide. Furthermore, we reach a valuable deposit of black- 
band ore within a mile or two of the station. The section, as thus 
completed, is as follows: i 
; Et. In 
Jesevel <lorevaGl CIR (7) TSELy TTMED STAND) 65.6066000600000606000000000000 BC LOGdLs 05000 5 
Coal—Upper Freeport, Blackband seam ............... LDasatai avast se hk 8 
lnttenval@concealedtaeaweusaseesaecctenecencseseclscssectesscsesdeesecseccecseses 140 
Coal—Middle Kittanning, No. 6.........ssccsccssseesoesese ee 3 
malmtenvaliconcealediens.-ncccssseseestee eee tee SCD ed OCR Eee 63 
Timestone—Putnam Hill, struck in drill-holes. 
Tae raviel liner ccemeats create ateisteteas caiae sa tees an ene cotece msn suites vice bene aes vias gaeie'le 70 
Limestone—Lower Mercer, struck in drill-holes. 
A. considerable deposit of black slate and coal was found about 
80 feet below the Lower Mercer limestone in several drill-holes in this 
immediate neighborhood. This deposit, which was counted as the 
Briar Hill or Sharon coal, by the drillers, will be considered in a sub- 
sequent chapter. 
We have now reached the streams that drain to Will’s Creek, and 
by means of the tributary valleys and the main valley, we can advance 
without interruption to the Cambridge coal field. Like the Connotton, 
Will’s Creek is a stream flowing against the general trend of the drain- 
6 G. 
