Information about ripples, dunes, and sedimentary structures including, explanatory text, computer-generated images and movies, photographs, and bedform-simulation software provided by the USGS.

Latest version (2005) of the open-access e-book authored by J.C. Deelman on dolomitization and related phenomena. A total of 505 text pages, including a number of graphs, drawings and photographs.

A reference book published under the aegis of the North American Commission on Stratigraphic Nomenclature.

Electronic facsimile of one of the founding book of the geological sciences, made available by Electronic Scholarly Publishing

This set of 8 volumes published between 1866 and 1890 is a rich resource of information about Illinois geology, landscape and mineral resources.

With more than 4600 entries it constitutes an instant technical reference for both the generalist and the expert oil geologist