Pseudo-stromatolite, extra large Chalcedony nodules with iron causing the orange

with iron causing the orange coloration

I only have the one

features the Mercedes termination characteristic of the Erongo region

The nodules are actually believed to be a fossil pseudomorph of prehistoric sponge colonies dating back to the Upper Cretaceous period

Pseudo-stromatolite, extra large Chalcedony nodules with iron causing the orangeLocale: Morocco Approx dimensions: 8 x 6 x 4" Approx weight: 8 lbs A stromatolite is a sedimentary fossil structure made by prehistoric bacteria colonies, typically cyanobacteria. Stromatolites in fact are still living and forming in some parts of our world today, including Australia, and are among the earliest forms of lifeand fossilson our Earth. The fossils form in shallow water conditions of lakes or salt water shores. First, cyanobacteria grow in