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In past eons, a lot of volcanic activity has occurred in New Mexico. Albuquerque (ABQ) is situated on a tremendous rift valley: the Rio Grande rift. There are whole mountains that used to be volcanoes (e.g., Mt Taylor and Valles Caldera in the Jemez). Also, there are hot springs. And there are 50 volcanic plugs or necks, where molten magma extruded from the earth’s crust at a local point, cooled, and became basalt rock.

There are black lava beds (El Malpais) that once flowed for miles from active volcanoes, then cooled into solid immovable rock. You can hike on them, but the rock is sharp and treacherous. If you fall into one of the many large fissures your bones may never be found.… More

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