Folded Structure. Harrisburg, PA. Geologic Map of Harrisburg, PA.

1966

O'Brien, Emmett J

1:250k

Harrisburg East

1993

1:24k

Harrisburg East

1969

1:24k

Harrisburg East

1969

1:24k

Harrisburg East

1947

1:24k

Harrisburg East

1947

1:24k

Harrisburg East

1947

1:24k

Harrisburg, Williamsport, Erie, Scranton.

1890

Mitchell, Samuel Augustus

Harrisburg, Williamsport, Erie, Scranton.

1886

Mitchell, Samuel Augustus

Harrisburg, Williamsport, Erie, Scranton.

1884

Mitchell, Samuel Augustus Jr.