Eastern Mojave Vegetation
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Eastern Mojave Vegetation
| Columbia Mountain as seen from the Blue Rock Mine in Macedonia Canyon. |
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At the very top of Columbia Mountain is an excellent example of supergene enrichment of copper ores. The idea behind supergene enrichment goes something like this. In the beginning there was a small amount of copper mineralization in the ore vein. As the mountain eroded away, the copper minerals were dissolved and then redeposited a few feet deeper in the vein. As a result the copper vein at the surface looks to be very rich. But just a few feet below the surface there is very little copper. Someone built a road to the top of Columbia Mountain, and dug some exploratory trenches in rich copper veins right on the very top of the mountain. However as soon as they got a few feet down, the vein was not rich enough to continue digging.
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Other photos about Geography - Eastern Mojave or Columbia Mountain.
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Date and time this page was prepared: 11/3/2024 5:37:50 PM |