A Large Stromatolite with Polished Surface

19th Century.

Stromatolites are layered biochemical accretionary structures formed in shallow water by the trapping, binding and cementation of sedimentary grains in biofilms (specifically microbial mats), through the action of certain microbial life forms . They have a variety of shapes and structures, or morphologies. Stromatolites occur widely in the Precambrian fossil record, but are rare today.

Height: 8 cm / 3.1 inches

Width: 20 cm / 7.8 inches

Depth: 15 cm / 5.9 inches

£980