. Jefferson, Berkeley, and Morgan counties, by Grimsley, assistant geologist. White, state geologist. p, at a point where the Baltimore andOhio Main Line crosses the ridge, and again on the countyroad west from Little Georgetown. The mountain fold seemsto die out just north of the Potomac River, and extends southto the Virginia State Line. The mountain is a very narrowcrested ridge with steep eastern slope, and it marks the west-ern boundary of the Great Valley. As the structure is followed north to near the HedgesvilleGap, the White Medina and Clinton disappear and the RedMedina is
. Jefferson, Berkeley, and Morgan counties, by Grimsley, assistant geologist. White, state geologist. p, at a point where the Baltimore andOhio Main Line crosses the ridge, and again on the countyroad west from Little Georgetown. The mountain fold seemsto die out just north of the Potomac River, and extends southto the Virginia State Line. The mountain is a very narrowcrested ridge with steep eastern slope, and it marks the west-ern boundary of the Great Valley. As the structure is followed north to near the HedgesvilleGap, the White Medina and Clinton disappear and the RedMedina is faulted against the narrow belt of Oriskany, butnorth of the Gap the White Medina and Clinton again appearand the former caps the ridge to the Potomac. At the gapwhere the railroad crosses the ridge, the Martinsburg Shaleis faulted against a small remnant of Helderberg Limestoneand in a shorl distance this limestone is faulted out and theMartinsburg Shale lies against the Hamilton Shales. Stillfurther north the Martinsburg Shale is faulted out, and at theof the lil^c the Beekmantown Limestone has also dis-.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectgeology, bookyear1916
