The Coal Measures of Maryland have frequently been considered by geologists independently of the deposits of the same age in the adjacent states of Pennsylvania and West Virginia. This has been in large measure due to the fact that the study of the Maryland Coal Measures has been mainly confined to the Georges Creek basin, a deep synclinal trough that presents the only full representation of the formations of the Coal Measures within the limits of the state. The consequent lack of continuity in many of the coal seams of this basin with those of other regions in Maryland and adjacent states has led to the establishment of local terms in denominating these seams, with the result that much confusion exists as to their equivalents in the other areas. Even the relatively small amount of consideration hitherto given to the Garrett County basins has been chiefly confined to the . . .

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