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USGS - U.S. Geological Survey
Provides science about the natural hazards that threaten lives and livelihoods; the water, energy, minerals, and other natural resources we rely on; the health of our ecosystems and environment; and the impacts of climate and land-use change.
Arkansas Geological Survey
Official state agency providing geological information in order to develop and enable effective management of the State’s mineral, fossil fuel and water resources while protecting the environment.
NMNH Department of Mineral Sciences
A National Museum of Natural History (NMNH) department. The NMNH is part of the Smithsonian Institution.
Images and Maps
Arkansas Geological Survey Maps
A collection of geologic maps in pdf format by quadrangle from the Arkansas Geological Survey.
Earth Science World Image Bank
Provided by the American Geological Institute (AGI), the Earth Science World Image bank website contains over 6,000 images related to the geophysical sciences for use by educators, the public, and the geoscience community. Images are organized by category.
National Geographic Map Database
The archive of standardized geoscience information for the United States.
The National Map
An interactive site for mapping statistics for the entire United States on a variety of themes and data points.
USGS Geologic Maps
The USGS and its partners, the State Geological Surveys, have since the 1800s been producing high quality, standardized geologic maps of the Nation.
USGS Topographic Maps
general-use maps at medium scales that present elevation (contour lines), hydrography, geographic place names, and a variety of cultural features.