Open-File Report 01-136
IntroductionThis map was originally designed to illustrate the lithologic nature of the rocks in the Appalachian orogen and to be an underlay for the mineral deposits database for the Appalachians. Most of the geology was compiled by John Peper; M. Foose added some additional peripheral sections. The mineral deposits were compiled in the early 1980s by a group of economic geologists within the USGS Eastern Mineral Resources Branch. These geologists included deposits that were of significant size and economic importance, but also included small deposits which represented the metallogenic character of the Appalachians. The intent of this mineral deposit compilations was to reflect the Appalachian mineral endowment and metallogeny. The geologic and mineral deposit compilation was concluded in the early 1990s and was done using manual drafting and typewritten tables. Subsequently, the project languished until GIS technology enabled the results of this manual work to be directly brought into digital formats. The files and folders are as follows: Files: peper.apr - The ArcView project file peper.aep - ArcExplorer project peper.axl - ArcExplorer 3.x (Java edition) project readme.txt - Descriptive text file Folders: data - ArcView shapefiles (compressed, 10.5 MB) age - geologic age of the units lithology - lithology of the units mineral_deposits - mineral deposits normal_flts - normal faults for the southeast states - states of the coverage area thrust_flts - thrust faults for the southeast docs - Metadata for data in this project metadata.txt - metadata file for geographic files references.doc - Microsoft Word document with list of sources for metal and related deposits sources.txt - text file that contains sources used to compile the Appalachian map e00 - Coverages that are in ARC export file format (.e00) age.e00 lithology.e00 mineral_deposits.e00 normal_flts.e00 thrust_flts.e00 index_map.jpg - map of the United States showing the map coverage area |
Posted online November 5, 2009 ESRI provides a free viewing software called ArcExplorer. It can be downloaded from their website at the following address: http://www.esri.com/software/arcexplorer/download.html |
Peper, J.D., Gair, J.E., Foose, M.P., Kress, T.H., and Dicken, C.L., 2001, Lithochronologic units and mineral deposits of the Appalachian Orogen from Maine to Alabama: U.S. Geological Survey Open-File Report 01-136, available online only.