System requirements: IBM or compatible personal computer; 640 KB RAM; MS- or PC-DOS 5.0 or later; Microsoft MSCDEX version 2.1 or later; CD-ROM drive with ISO 9660 software driver; EGA/VGA graphics system.
Geologic Names Unit Lexicon (GNULEX) / compiled by M.E. Mac Lachlan ... [et al.] -- Geologic Names of the United States (GEONAMES) / compiled by C.R. Murdock and M.L. Hubert ; database designer and programmer: C.C. Abston.
A computerized lexicon of geologic- and stratigraphic unit names used in the United States, its possessions and territories. It may be sorted by geographic name, stratigraphic rank, age, geologic province or region, state, author, or specified keywords.