STRATIGRAPHICAL ORDER. 85 
ereek. It has long been worked in sections 18 and 19 for the manu- 
facture of salt, at both Warden’s and Broom’s (formerly Ferbrache’s) 
Salt Works. It lies 15 or 20 feet above the level of the creek in all of 
the mines in this neighborhood. The Lower Kittanning coal has been 
reached by Robert R. Miller in a shaft on his farm, section 12, and 
also by J. M. Warden on section 18. The interval varies from 28 to 
33 feet. The character of the coal in Warden’s shaft is excellent. In 
early days this coal was pried out of the creek bed at Miller’s Ford. 
The Middle Kittanning coal all through the valley is known as the 
“Middle Vein,” and the Lower Kittanning coal as the “Lower Vein.” 
The term “upper vein” is applied to the Lower Freeport or Upper 
Freeport indifferently, the latter being worked in far the largest number 
of instances. On Robert R. Miller’s farm we find a short though ex- 
cellent section. It is as follows: 
Ft. In 
Coal—Lower Freeport, formerly mined in small way.. ............... 1 6 
ine=claywandushlal Oiscccc.ccvcsctssccesecscseosiesleseavccccindecssnsesscseeehceeces 10 
TAmestone= Lower Pree portiricc.ceccstscsese svete cctescosceschccevecescssoceseces 1 
Worceal cole eee Ns a Me Me epee tesa oa a hee pees cath 65 
Coal==Middley Kattanmnin g NOs Gis sens..ccsccecccsesesssenecsssccccerccssescces 3 
Hire-clayasialevandsnodulestotoreiecetcecssscodsccseoreteteceses ceases: 28 
Coal—Lower Kittanning (in shaft), reported to be...............see00 4 9 
At Broom’s Salt Works, on the east side of the creek, a long and 
valuable section is found. It may be made to include the Lower Kit- 
tanning and the Lower Freeport coals also, as both are found in the im- 
mediate neighborhood, though not recognized at this very point. The 
section is seen in Fig. X VIL. 
Tt will be seen that this section almost duplicates the Kimbolton 
section. By the two, the following facts are established, viz.: (1) the 
interval between the Middle Kittanning and the Upper Freeport coals 
is here about 160 feet, an increase of 20 or 30 feet from the Tuscarawas 
county sections ; (2) the Cambridge limestone lies 110 feet above the 
Upper Freeport coal; (8) the Upper Freeport coal is no longer capped 
with blackband. ‘The disappearance of this last-named element is not 
abrupt. At Kimbolton, on the farm of Joseph Proctor, section 22, 
Liberty, the black shale above the coal has thin courses of genuine 
blackband ore, but the aggregate is not large enough to repay working. 
Similar facts are found throughout the vicinity. 
A thin coal seam that comes in between the Middle Kittanning 
