Ecosystems, Conservation, Ocean Studies, GIS, Hydrology - you can download free digital textbooks on all this and more from the Earth Science section of National Academies Press. Price listed is for delivery of paperback copies.
An animated, video, html, lesson about plate tectonics that includes Wegner's hypothesis, the Theory, the driving forces, the three plate boundaries, convection curreents, hot spots, and plate tectonic reconstruction.
The Mineralogy Database contains 4,714 individual mineral species descriptions with links and a comprehensive image library. Tables devoted to crystallography, crystal structures, X-Ray powder diffraction, chemical composition, physical and optical properties, Dana's New classification, and Strunz classification available.
From molten mass to snowball Earth, see continents grow and shift as you scroll through billions of years. Explore data on atmosphere, climate, and biosphere. Created by the Howard Hughes Medical Institute. Free Apple
Combines earthquake data from over a dozen sources including the USGS to create current, interactive seismographic ESRI map. Toggle map layers such as topographic, terrain and ocean bathymetry. Filter by depth, magnitude, distance and date. Push notifications. Free Apple
Uses many sources, including USGS, to create a Google map of earthquakes around the world with Push notifications. Filter by region, magnitude and depth. Supports historical data and data collection. Free Android