Odds are great that the rock you are interested in learning about is sourced from such a deposit. As lava rocks basalt in the technical term,you can see remnants of this from the hills above Mountain Home to the canyons of the Snake, Bruneau, Owyhee, Malheur, and Payette rivers. One thing to recognize is that we live in what was, until geologically recently, a volcanically active region, and a great deal of heavy, dense, black/dark, and ferrous (i.e., attractive to magnets) igneous rock was produced and spread out over our region. Many normal terrestrial rocks have these properties, so these lines of evidence do not mean the rocks in question are extraterrestrial in origin. We have heard the following statements as evidence that their rocks may be meteorites by those inquiring: Please contact an assay office or mining consultant for that service.
Note that while our faculty are highly trained in our various fields of geology, including identification of different species of meteorites, it is not our practice to provide analyses or assay service, as it were, for rocks of any type. With the increase in “reality” shows that follow the searching and discoveries of meteorites by professionals, the Department of Geosciences is receiving at least one inquiry per week regarding findings of meteorites.
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