Open-File Report 2006-1260-B
Prepared in Cooperation with the Commonwealth of Massachusetts, Office of the State Geologist and Executive Office of Environmental Affairs
Compiled by Byron D. Stone, Janet Radway Stone, and Mary L. DiGiacomo-Cohen
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Surficial Geologic Map (1:50,000 scale, 54x36 inches) [24-MB PDF] |
AbstractThe surficial geologic map shows the distribution of nonlithified earth materials at land surface in an area of 16 7.5-minute quadrangles (total 658 mi2) in northeast Massachusetts. The geologic map differentiates surficial materials of Quaternary age on the basis of their lithologic characteristics (grain size, sedimentary structures, mineral and rock-particle composition), constructional geomorphic features, stratigraphic relationships, and age. Surficial earth materials significantly affect human use of the land, and an accurate description of their distribution is particularly important for water resources, construction aggregate resources, earth-surface hazards assessments, and land-use decisions. This compilation of surficial geologic materials is an interim product that defines the areas of exposed bedrock, and the boundaries between glacial till, glacial stratified deposits, and overlying postglacial deposits. This work is part of a comprehensive study to produce a statewide digital map of the surficial geology at a 1:24,000-scale level of accuracy. This report includes explanatory text (PDF), a regional map at 1:50,000 scale (PDF), quadrangle maps at 1:24,000 scale (PDF files), GIS data layers (ArcGIS shapefiles), metadata for the GIS layers, scanned topographic base maps (TIF), and a readme.txt file. |
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Document Accessibility: Adobe Systems Incorporated has information about PDFs and the visually impaired. This information provides tools to help make PDF files accessible. These tools convert Adobe PDF documents into HTML or ASCII text, which then can be read by a number of common screen-reading programs that synthesize text as audible speech. In addition, an accessible version of Acrobat Reader 7.0 for Windows (English only), which contains support for screen readers, is available. These tools and the accessible reader may be obtained free from Adobe at Adobe Access. Suggested citation: Stone, B.D., Stone, J.R., and DiGiacomo-Cohen, M.L., 2006, Surficial Geologic Map of the Salem-Newburyport East-Wilmington-Rockport 16 Quadrangle Area in Northeast Massachusetts: U.S. Geological Survey Open-File Report 2006-1260-B. |
U.S. Department of the Interior |
U.S. Geological Survey
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