Philadelphia folio : Norristown, Germantown, Chester, and Philadelphia quadrangles, Pennsylvania-New Jersey-Delaware /
Bascom, F.(Florence),1862-1945.
Geological Survey (U.S.)
Washington, D.C. : The Survey,
1909.
Relief shown by contours and spot heights.
Cover title.
"Columnar section" on verso of p.23.
Plates: [1] Topography, Norristown quadrangle -- [2] Topography, Germantown quadrangle -- [3] Topography, Chester quadrangle -- [4] Topography, Philadelphia quadrangle -- [5] Areal geology, Norristown quadrangle -- [6] Aeral geology, Germantown quadrangle -- [7] Areal geology, Chester quadrangle -- [8] Areal geology, Philadelphia quadrangle -- [9] Structure sections, Norristown quadrangle -- [10] Structure sections, Germantown quadrangle -- [11] Illustrations.
Location map on cover.
Text and ill. on inside covers.
List of folios on back cover.
Descriptive text -- Columnar section -- Topographic map -- Areal geology maps--Structure section sheet-- Illustration sheet.
Geology
Geology
Geology
Geology
Geology
Geology
Geology