basaltic Malapai Hill

If you take the Geology Tour Road at Joshua Tree, as you get into the basin and turn right at the Berdoo road and come back around to the west, you'll get a nice view of the entire valley looking back up towards the main body of the park. You'll see this big hill on the left, which is called Malapai Hill. That hill is a giant mound of basalt. This is a geologist's paradise, I suppose, with granite, gneiss, marble, basalt and tons of other rocks and minerals

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