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Stratigraphic Framework and Depositional Sequences in the Lower Silurian Regional Oil and Gas Accumulation, Appalachian Basin: from Jackson County, Ohio, through Northwestern Pennsylvania, to Orleans County, New York

By Robert T. Ryder

Online Version 1.0


The PDF files of the map will produce a plot that faithfully replicates the format, symbols, colors, and line work of a USGS full-color printed map. (The actual published paper maps are 4-color offset-printed maps.) Sheet 1 is 1.6 MB, and page size at 100% is approximately 55" by 36". Sheet 2 is 450 KB, and page size at 100% is approximately 48" by 32". Plot resolution, quality, and colors will vary with plotter, inks, and paper used. Adobe Acrobat Reader 4 or later is required to read the map. Acrobat Reader 3 cannot display the maps because the page size exceeds the program's capabilities. A text pamphlet accompanies the map. This PDF file is 134 KB

Text pamphlet accompanying Geologic Investigations Series Map I-2726 [134 KB PDF file]
Geologic Investigations Series Map I-2726 Sheet 1 [1.6MB PDF file]
Geologic Investigations Series Map I-2726 Sheet 2 [450 KB PDF file]

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The offset-printed version of this map is available for purchase from USGS Information Services. See Ordering U.S. Geological Survey Products, call toll-free (from the U.S.) 1-888-ASK-USGS, or e-mail

U.S. Department of the Interior, U.S. Geological Survey
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Maintained by: Eastern Publications Group
Contact: Robert T. Ryder
Last Modified 07.12.01