The COSUNA Correlation Charts are intended to show stratigraphic columns which provide fairly complete coverage of the geology of the United States. Because the COSUNA Charts are correlation charts and not cross-sections, their vertical scale is time, not thickness.
Detailed information regarding the contacts, lithology, paleontology, references, and other significant information on each of the units... is available by accessing the computerized COSU data file on the Petroleum Data System of the University of Oklahoma, Norman.
[1] Atlantic coastal plain region -- [2] Central California region -- [3] Midwestern basin and Arches region -- [4] Northern Appalachian region -- [5] Northern California region -- -- [6] Northern Mid-Continent region -- [7] Northern Rockies/Williston basin region -- [8] Southern Appalachian region -- [9] Southern California region -- [10] Southwest/Southwest Mid-Continent region -- [11] Great Basin region -- [12] New England region -- [13] Mid-continent region -- [14] Piedmont/Blue Ridge region -- [15] Texas-Oklahoma tectonic region -- [16] Southern Alaska region -- [17] Northern Alaska region -- [18] Central and southern Rockies region -- [19] Gulf coast region -- [20] Northwest region