Alkali-Nuts: Mont Saint-Hilaire: Located East of Montréal, in Mont Saint-Hilaire and has become a major collecting site of rare mineral specimens. Offers mineral and assemblage guide, along with local dealer listings

Earth Impact Database: Crater names, location, size, and age. Background information, images, FAQ

United States Geological Survey (USGS): Scientific agency for natural sciences, including earth science and biology. Extensive information on U.S. water, biological, energy, and mineral resources, USGS programs, and natural disasters and hazards