Dead trees in the terraces of Mammoth Hot Springs, <a href="https://en.wikipedia.org/wiki/Yellowstone_National_Park" class="extiw" title="w:Yellowstone National Park">Yellowstone National Park</a>, Montana, US. These trees grew during inactivity of the mineral-rich springs, and were killed when calcium carbonate carried by spring water clogged the vascular systems of the trees. The same process also effectively preserves the trees by preventing decay.
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<span class="int-own-work" lang="en">Own work</span>