Giant Cousins of 'Mars Blueberries' in Utah

Tiny, gray rock-spheres on Mars, called 'blueberries,' are much like 8-inch versions found in Utah. In both worlds, "underground minerals precipitated out of flowing groundwater." Therefore, studying the rocks found in Utah can provide important information regarding the history of water on Mars. Both Martian and Earthen blueberries form in natural cracks and depressions, and it is possible that organisms could have played a role in the strange rocks' formations. For instance, microbes can allow for the formation of concretions. Could this be the case on Mars??

http://www.space.com/scienceastronomy/utah_blueberries_040616.html