After the boiling hot mineral water oozes up from the earth, it eventually starts to cool and the mineral elements fall out of suspension. Since the edges are cooler than the middle, the sediment builds up a little perimeter wall one grain at a time. Over time, large cascading pools are created as they overflow and puddle to create more.

These guys brought a great smile to my face as soon as I saw them. They looked so funny and entertaining, I nearly titled the shot "Abbott & Costello" after the famous comedian pair. They had a certain life about them, as if they were a part of some mythical legend beings that became frozen into these rock formations. The two formations are actually a fair distance apart, making a combined photo more of a challenge. So I did my usual circle the item of interest until you find the best perspective. I tried hiking a ways away and zooming in from a neighboring hill, then up close, then this side or another, until discovering this perspective that worked perfectly for my taste.

Southern Arizona wilderness

two female bears resting on a sandbar in the middle of a lake (Aleutian Islands).

Yucca tree (Yucca brevifolia) in Mojave desert.

Sunset over ocean at Wailea, Maui

geyser at Yellowstone

foliage on the tropical island of HaiNan