Cretaceous Rocks: A page from the Tapestry of Time and Terrain map site, produced by the USGS, that illustrates the exposures of Cretaceous rocks in the United States. The site includes additional links and information.
New Jersey Geological Survey maps: This NJ Geological Survey page offers downloadable pdf files of some bedrock, and several surficial, geologic maps of the state.
Illinois State Geological Survey, Quaternary Deposits Map: Map showing the extent of the Quaternary glacial deposits covering Illinois.
Paleogeography and Geologic Evolution of North America: The images presented here show the paleogeography of North America over the last 550 million years of geologic history.
GeoStor: GeoStor provides free digital map data for any area of Arkansas.
The Paleomap Project: This site offers illustrations of the plate tectonic development of the ocean basins and continents, as well as the changing distribution of land and sea, during the past 1100 million years.
The Paleogeographic Atlas Project: This group creates map reconstructions to be used as base information for studies of past fossil distributions, and for climatic or oceanographic patterns as determined from the fossils, the sediments and from computer modeling studies.
Division of Geological and Geophysical Surveys Publications, Alaska Department of Natural Resources: Maps and text publications from the Department of Natural Resources Geological and Geophysical Surveys.