Seismotectonic maps in the vicinity of the lower Wabash Valley, Illinois, Indiana, and Kentucky - Digital Spatial Database: Structure contours on Cambrian-Precambrian unconformity

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Description This cover contains structure contours of the elevations of the unconformity at the Cambrian-Precambrian boundary. These data were contributed by Glenn Bear of Indiana University as part of the work on his doctoral thesis. The southern part of the map was
Originators Rhea, Susan
Publication U.S. Geological Survey Open-File Report 97-0681

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attributes of point symbols

Label Definition
SYMBOL code for symbol used to plot syncline, anticline features


attributes of contour lines

Label Definition
DEPTH depth to Cambrian-PreCambrian unconformity, in thousands feet below sea level
SYMBOL code for symbol used to plot contours