Open-File Report 96–48
	Surficial geology of the Allentown 30x60-minute quadrangle by Braun, D. D. 1996
Suggested Citation:	Braun, D. D., 1996, Surficial geology of the Allentown 30x60-minute quadrangle: Pennsylvania Geological Survey, 4th ser., Open-File Report 96–48, 17 p., 1 map, scale 1:100,000. [Available online.]
Description:	This report consists of a short text and a 1:100,000-scale, two-tone, surficial geologic map of the Allentown 30- x 60-minute quadrangle in eastern Pennsylvania. The area shows the effects of at least three Pleistocene glacial advances. The report map is a compilation and revision of published and unpublished, 1:24,000-scale, detailed-reconnaissance maps. Types of surficial geologic units include 14 anthropogenic, 8 alluvial or wetland, 16 colluvial, and 12 Wisconsinan, Illinoian, or pre-Illinoian glacial. Eleven types of bedrock units are shown, defined by rock type and color. The text provides a description for each map unit, explains the methods used to create the map, and discusses previous work in the area.
Download Publication:	Click Here  (25 MB)