These stromatolites are totally amazing and I continuously marvel at their intricacy! This one is 1 lb 9.7 oz and 5.5” by 3.9” by 3.25” and rather resembles a flower garden. Stromatolites are Pre-Cambrian fossils of microbiological colonies or ‘mats’, likely cyanobacteria. Cyanobacteria are marine bacteria found in all over the globe and are the main mechanism for carbon fixation in the oceans. Some are deep sea and others are surface, but all manage to thrive in concentrations of metallic ions that others cannot (either high or low) and some are boldly pigmented. They are found everywhere … at ocean depths, along oceanic shores and even in areas where there were once ancient oceans. In fact, many scientists postulate that the oceans were derived from the stars as icy meteors struck Earth and provided the first water and microorganisms. For these species, albeit primitive, to persist since practically the dawn of life on Earth, they have adapted and changed. Continually evolving and yet maintaining their role in the huge chain of life, these organisms were a brave first "step" in a new and hostile land.
Click on the link below to see additional pictures.

Impressive and Gorgeous Stromatolite Flower Garden