Kittanning coal refers to coal

Coal

Coal is a combustible black or brownish-black sedimentary rock usually occurring in rock strata in layers or veins called coal beds or coal seams. The harder forms, such as anthracite coal, can be regarded as metamorphic rock because of later exposure to elevated temperature and pressure...

 seams in the Kittanning cyclothem of the Pennsylvanian

Pennsylvanian

The Pennsylvanian is, in the ICS geologic timescale, the younger of two subperiods of the Carboniferous Period. It lasted from roughly . As with most other geochronologic units, the rock beds that define the Pennsylvanian are well identified, but the exact date of the start and end are uncertain...

 Epoch. The Lower Kittanning is coal number 5, while the Middle Kittanning is coal number 6. These were and are economically important coal seams in the Appalachian area. The Middle Kittanning is at about surface level in the valleys of Monday Creek

Monday Creek

Monday Creek is a tributary of the Hocking River, 27 miles long, in southeastern Ohio in the United States. Via the Hocking and Ohio Rivers, it is part of the watershed of the Mississippi River, draining an area of 116 square miles on the unglaciated portion of the Allegheny Plateau...

 and Sunday Creek

Sunday Creek

Sunday Creek is a tributary of the Hocking River, 27.2 miles long, in southeastern Ohio in the United States. Via the Hocking and Ohio Rivers, it is part of the watershed of the Mississippi River, draining 139 square miles in a mainly rural area of the Allegheny Plateau region...

 in southeastern Ohio

Ohio

Ohio is a Midwestern state in the United States. The 34th largest state by area in the U.S.,it is the 7th‑most populous with over 11.5 million residents, containing several major American cities and seven metropolitan areas with populations of 500,000 or more.The state's capital is Columbus...

, but become much deeper going east. Many villages in southeast Ohio grew up around the mining of the Middle Kittanning. Many of these are known as the "Little Cities of Black Diamonds

Little Cities of Black Diamonds

The Little Cities of Black Diamonds is a term that refers to old coal-mining communities of southeast Ohio. Some communities include:*Nelsonville, Ohio*Buchtel, Ohio*Glouster, Ohio*Trimble, Ohio*Murray City, Ohio*Hemlock, Ohio*Carbon Hill, Ohio...

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