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"A free online newsletter that provides news, feature stories, research results, and editorials from the earth and space science-related disciplines. It is published by the American Geophysical Union (AGU)." -- Highly recommended by Choice Reviews Online, May, 2015.
"GeoSTRAT – Geosciences Technical Resource Assessment Tool Find locations of springs, mines, sinkholes and more using the Missouri Geosciences Technical Resource Assessment Tool. GeoSTRAT is a Web application that makes geologic and hydrologic data readily available for public use. GeoSTRAT enables users to easily visualize and explore geospatial data using an interactive map. Data also can be downloaded in formats compatible with a variety of free and commercial mapping software."--http://www.dnr.mo.gov/geology/geostrat.htm
Geosciences LibreTexts, Contributed by Chris Johnson, Matthew D. Affolter, Paul Inkenbrandt, & Cam Mosher
Faculty (Geology) at Salt Lake Community College Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
"This visualization is created and maintained by Ian Webster. See more of my work at ianww.com or email me at email@example.com.
Plate tectonic and paleogeographic maps by C.R. Scotese, PALEOMAP Project. For more information visit: https://www.earthbyte.org/paleomap-paleoatlas-for-gplates & www.globalgeology.com. Some elements of this visualization are not adjusted for time (eg. cloud and star positions). The coloring of the maps is based on elevation and bathymetry. The locations are accurate to ~100 km." -- https://dinosaurpictures.org/ancient-earth#