Travertine is not only a geological wonder but also a popular building material. Its use dates back to ancient Rome, evident ...

Discover how rocks, minerals & the rock cycle change your world. Join the Science Trek team to explore rocks and minerals! Discover how the Earth formed, the three types of rocks, the rock cycle, and ...

The early earth / editor, D.R. Nelson. Earth's formation and first billion years / D.R. Nelson. The early Precambrian stratigraphic record of large extraterrestrial impacts / B.M. Simonson, G.R.

How do rocks change over time? Idaho's geology makes it a special place for finding many different kinds of rocks and minerals. Minerals are made from 92 chemical elements that join together in many ...