Image Lehigh Valley Geology Topographic Map of Lehigh County Pennsylvania Bulletin C 39, Plate 2 TOPOGRAPHIC MAP OF LEHIGH COUNTY PENNSYLVANIA Showing mines and quarries By B.L. Miller, D.M. Fraser, B. Willard, R.L. Miller, C.H. Behre, Jr. and E.T. Wherry 1942 Approximate mean Declination 1937 Contour interval 20 feet Datum is mean sea level Base from U.S. Geological survey topographic maps of Allentown, Allentown West, Boyertown, Hamburg, Mauch Chunk and Quakertown Quadrangles. View Item
Image Lehigh Valley Geology Geologic Map of Northampton County Pennsylvania Bulletin C 48, Plate 1 Commonwealth of Pennsylvania Department of Internal Affairs Thomas A. Logue, Secretary TOPOGRAPHIC AND GEOLOGIC SURVEY George H. Ashley, State Geologist GEOLOGIC MAP OF NORTHAMPTON COUNTY PENNSYLVANIA By B.L. Miller, D.M. Fraser, C.H. Behre, Jr., E.T. Wherry, R.L. Miller and P.B. Myers 1939 Base from U.S. Geological Survey topographic maps of Allentown, Delaware Water Gap, Easton, Munch Chunk, West Allentown and Wind Gap Quadrangle's. Surveyed in cooperation with the commonwealth of Pennsylvania Kittatinny (Blue) Mt. View Item
Image Lehigh Valley Geology Geologic Map of Lehigh County Pennsylvania Lehigh County Bulletin C 39, Plate 1 Pennsylvania Dept. of Internal Affairs William S. Livengood, Jr., Secretary Topographic And Geologic Survey George H. Ashley, State Geologist LEHIGH COUNTY PENNSYLVANIA By B.L. Miller, D.M. Fraser, B. Willard, R.L. Miller and E.t. Wherry 1942 Approximate mean Declination 1937 Contour interval 20 feet Datum is mean sea level Base from U.S. Geological Survey topographic maps of Allentown, Allentown West, Boyertown, Hamburg, Mauch Chunk and Quakertown Quadrangles. View Item
