...Falls on the Potomac, it passes slightly west of Rockville and of Hood's Mills, then through Finksburg on the Western Maryland railroad, and thence by a...These appear to be infolded in the gneisses, and are possibly connected with the main area by a narrow tongue passing the Northern Central railroad near...

...Falls ou the Potomac, it passes slightly west of Rockville and of Hood's Mills, then through Finksburg on the Western Maryland railroad, and thence by a...Peach Bottom and Delta roofing slates. These appear to lie infolded in the gneisses, and are possibly connected with the main area by a narrow tongue passing...

...Falls on the Potomac, it passes slightly west of Rockville and of Hood's Mills, then through Finksburg on the Western Maryland railroad, and thence by a...These appear to be infolded in the gneisses, and are possibly connected with the main area by a narrow tongue passing the Northern Central railroad near...

...Falls on the Potomac, it passes slightly west of Kockville and of Hood's Mills, then through Finksburg on the Western Maryland railroad, and thence by a...Pennsylvania line. Further eastward there is a large urea of the semi-crystalline schists in Harford county, surrounding the Peach Bottom and Delta roofing...

...county surrounding the Peach Bottom and Delta roofing-slates. These appear to be infolded in the gneiss and are probably connected with the area near Finksburg by a narrow tongue passing the Northern Central Railway at Whitehall. The most striking feature in the structure of the Piedmont Plateau is its radiating...

...county surrounding the Peach Bottom and Delta roofing-slates. These appear to be infolded in the gneiss and are probably connected with the area near Finksburg by a narrow tongue passing the Northern Central Railway at Whitehall. The most striking feature in the structure of the Piedmont Plateau is its radiating...

...county surrounding the Peach Bottom and Delta roofing-slates. These appear to be infolded in the gneiss and are probably connected with the area near Finksburg by a narrow tongue passing the Northern Central Railway at Whitehall. The most striking feature in the structure of the Piedmont Placeau is its radiating...

...county surrounding the Peach Bottom and Delta roofing-slates. These appear to be infolded in the gneiss and are probably connected with the area near Finksburg by a narrow tongue passing the Northern Central Railway at Whitehall. The most striking feature in the structure of the Piedmont Plaieau is its radiating...