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Aerial photograph southwest of Blackbird, Delaware, showing the Borthwick area
Aerial photograph southwest of Blackbird, Delaware, showing the Borthwick area
Aerial photograph southwest of Blackbird, Delaware, showing the Borthwick area
Aerial photograph southwest of Blackbird, Delaware, showing the Borthwick area
Aerial photograph southwest of Blackbird, Delaware, showing the Borthwick area
Geologic map of Clayton quadrangle, topographic map. Areal Geology. Clayton Quadrangle. Delaware, New Castle and Kent County. Miocene, Pleistocene (Columbia group), Late Pleistocene and Recent, Tertiary, Quarternary.
Aerial photograph southwest of Blackbird, Delaware, showing the Borthwick area
Aerial photograph southwest of Blackbird, Delaware, showing the Borthwick area
Aerial photograph southwest of Blackbird, Delaware, showing the Borthwick area