2016-12-10T11:03:02ZThe whole Earth on average consists of the same mixture of stuff we see elsewhere in the solar system, but the core has to be iron metal along with some nickel.
2016-12-10T11:03:02ZGeologic map of Utah, part of a set of all 50 states. Page 44.
2016-12-10T11:03:02ZThe basics about this important geologic commodity.
2016-12-10T11:03:02ZBanded iron formation or BIF is one of the major types of sedimentary rocks. Page 4.
2016-12-10T11:03:02ZRock gypsum is one of the major types of sedimentary rocks. Page 20.
2016-12-10T11:03:02ZHow geologists sort out granite from the rocks that look like it.
2016-12-10T11:03:02ZThe United Nations' global map of seismic hazard
2016-12-10T11:03:02ZBauxite is an uncommon but economically important sedimentary rock. Page 5.
2016-12-10T11:03:02ZPorcellanite is a subtle sedimentary rock type. Page 19.
2016-12-10T11:03:02ZGeologic map of Texas, part of a set of all 50 states. Page 43.
2016-12-10T11:03:02ZBiotite is an iron-rich member of the mica minerals.
2016-12-10T11:03:02ZThe major metamorphic rock types, from regional, contact and mechanical metamorphism.
2016-12-10T11:03:02ZExperiments with using coins in your Mohs hardness kit.
2016-12-10T11:03:02ZThis interesting sedimentary rock has a key role in the geochemical cycle.
2016-12-10T11:03:02ZThree 'living fossils' from the plant kingdom.
2016-12-10T11:03:02ZA handful of very abundant minerals account for the great majority of the Earth's rocks.