IMPLICATION OF FRACTURE PATTERNS WITHIN LIMESTONES OF THE LATE PENNSYLVANIAN CONEMAUGH GROUP IN SOUTHEAST OHIO
The results of this study support the results of previous local studies and extend the data set from the Upper Brush Creek limestone to the Upper Pittsburgh limestone. Two dominant trends about 70o apart can be noted from this interval. The first is oriented approximately N-S (350o-000o) and the second at 055o-065o. Three minor orientations also occur at 310o-320o, 010o-020o and 080o-090o. This contrasts somewhat with previous results, in which N-S set is a minor trend and the 040o-050o set is more pronounced. However, the data support interpretations that one set lies parallel to the regional Appalachian fold axis orientation (longitudinal joints), while the other lies parallel to the principle stress in the region. Collectively, the data compiled in southeast Ohio can be used to model local structures and has implications for the regional Alleghanian orogenic pattern. The compilation may also help to model fluid migration through the Conemaugh Group.