Everyone knows about Yellowstone’s geysers and hot pools.
But some of the geology is pretty strange.
That’s steam rising because blazing hot water is bubbling out at the top. The white is from the minerals the hot water dissolved on its way to the surface, which have now cooled and settled out from the water…and built all the hills and valleys on this cliff face. The yellow and brown and sort-of-green colors are the microbes and algae that grow in the hot water.
The pile of mineral this hot spring has created over the years is probably as tall as a 5 story building, and longer than 3 football fields! This photo only shows part of its length.
Who knows why the bubbling hot water creates these shapes rather than the smooth cascades at the other end. Some of these are larger than your bathtub.
This large mound is found at Mammoth Hot Springs at the northwest part of the park. Across the top to the northeast portion is Tower Falls.