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. Surveyed in cooperation with the Commonwealth of Pennsylvania Explanation Areal Geology Alluvium High-level gravels Illinoian terminal moraine Brunswick conglomerate Diabase intrusions Strata baked near intrusions Brunswick shale Tuscarora conglomerate Upper Martinsburg sandstone and shale Lower Martinsburg shale Jacksonburg limestone Beekmantown limestone Allentown limestone Tomstown limestone Hardyston sandstone Byram gneiss Pochuck gneiss Moravian Heights formation Franklin formation DIPS AND STRIKES Dips and Strikes Kittatinny (Blue) Mt. Ontelaunee Creek Shochary Ridge Lyon Creek Fogelsville Swabia Creek South Mountain Hosensack Creek Faults Generalized cross section of Lehigh County from Kittatinny (Blue) Mt. To southern border passing through Fogelsville Detailed complicated structure omitted Horizontal scale: 1"" 62500' Vertical scale: 1"" 31250