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Showing results for tags 'lucustrine'.
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I found these in Miocene lake bed limestone in central Arizona. Palm, reeds and stromatolites have been found in same layer nearby. I see no radial laminations that may indicate that these are algal growths. What are these round cap like structures? @paleoflor All the ones that I have found are round and 3 to 4 cm across. They are all shaped like spheres with the bottom 55 to 60% “missing”. The first three photos are from the top, side and bottom views. The fourth photo is of one still in the rock. The slight gap around the sphere appears to be an empty mold of the mystery object. The last photo is my drawing of what most of the fossils look like. I have an idea of what they might be. Let’s get some other opinions before I give you mine. 1 top view 2 semi side view 3 bottom view 4 in situ 5 idealized diagram
