http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Stratigraphic correlation chart of Pennsylvania
Bureau of Topographic and Geologic Survey.
1 diagram : color ; 121 x 96 cm., on sheet 147 x 107 cm., folded in envelope 28 x 22 cm.
by Thomas M. Berg [and others] ; James H. Dolimpio, cartographer.
Not a map; shows stratigraphic columns by time (vertical) and geographic area (horizontal).
Accompanied by fact sheet: Addendum--stratigraphic correlation chart of Pennsylvania : third printing, slightly revised / compiled by Jon D. Inners. 2 pages ; 28 x 22 cm., folded to 14 x 22 cm.
Includes text, notes, ancillary "Index map", and "Alphabetical list of stratigraphic units".