New answers tagged

1

For dating old geological material, zircon dating is sometimes used. Also see Uranium-lead dating. There is also data from Antarctic and Greenland ice cores. Other things you could look are Earth formation theories - the core accretion model & the disk instability model as well as plate tectonics and continental drift. There are also the theories about ...


2

Graphite occurs naturally in metamorphic rocks or at the contact between an igneous intrusion and a carbonaceous body. Natural graphite deposits occur as lenses or layers of disseminated or massive flakes. What form the deposits take depends on the geologic background. One type called amorphous graphite, for example, is formed by the thermal metamorphism of ...


Top 50 recent answers are included