Mountain Coalfield

This coalfield is in Blair County; northern Cambria County; and part of Indiana County and southern Clearfield County. The Windber Coalfield is to the south of it, and the Clearfield Coalfield is to the north of it. This is where the low-volatile metallurgical coal of the Windber Coalfield is morphing into a medium-volatile met and steam coal (as high as ~14,500 BTU/lb here), specifically in the Lower and Upper Freeport; and Lower and Upper Kittanning coal seams. There were a few beehive coke ovens around Barnesboro, Bennington, and Glen White. In the Mountain Coalfield (also sometimes called the Allegheny Mountain Coalfield) can be found the only area where coal was commercially mined in Blair County. (However there is a small area north of Altoona called the Tipton Run Coalfield, but I don't think the coal was ever mined on a commercial scale.)