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If ancient drought choked the Southwest for centuries, what does the future hold?


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The paleohistory that his team analyzed in the stalagmites that formed in Leviathan cover nearly the same time frame that humans first started using Danger Cave, which is now considered one of the Great Basin’s most important human history sites.
The stalagmites are created by the slow buildup of calcium carbonate layers as water droplets fall from the cave ceiling. They offer a “readable” record, much like the tree ring records that are a staple of climate science.
“We’re able to date those layers using chemistry rather than actually counting them like they do in a tree ring,” Lachniet said. “We measure the concentration of uranium naturally occurring in the calcite, and that tells us how old the stalagmite is.” ....

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How Would Our Modern Arid West Confront 'Drought' Lasting Hundreds Of Years?


Earlier climate change had life-changing effects on the ancient people who stayed in Danger Cave. Fresh water that supported fish and abundant wildlife dried up and left inhabitants with the labor-intensive chore of extracting tiny seeds form pickle weed and other drought-hardy plants, the archaeological record shows. Of course, in the past, there were a lot less people in the West needing less of finite water supply. Photo by Judy Fahys/InsideClimate News
EDITOR S NOTE: 
 
Mountain Journal is a content-sharing partner with InsideClimate News, a Pulitzer Prize-winning nonprofit, nonpartisan news organization that provides essential reporting and analysis on climate, energy and the environment. ....

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