Stromatolite - Fossil fragment - Estromatolito (No reserve price)

Fossil colonial stromatolite - Microbial mat of cyanobacteria - One of the oldest fossils. Description: Fossil of botryoidal/colonial stromatolite, formed by colonies of photosynthetic cyanobacteria that built the planet's first reefs and generated the atmospheric oxygen. Irregular abstract-shaped specimen with 7-8 visible stromatolitic domes/cuppolas, with a very pronounced eye-of-needle concentric growth structure - lamination visible in circles. The color is reddish-brown - ochre, due to iron oxidation of the sandstone matrix. Wavy laminar structure typical of microbial growth. Type: Domal stromatolite - Collenia/Conophyton-type colonies - Stromatolitic limestone Locality: Region of Atar, Mauritania / Anti-Atlas Morocco - Sahara Geological Age: Precambrian - Neoproterozoic - Approx. 600 - 800 million years - subtidal marine This fossil predates the dinosaurs, predates the trilobites. It is the origin of life. Measurements: Height: 140 - 16.5 cm Width: 9.5 cm Conservation: Good / Very good. Natural, without restoration, without resin, without paint. Original laminations intact, unpolished. Natural irregular edge. Piece stable, solid. Scientific Note: Stromatolites are the oldest fossil evidence of life on Earth, about 3,500 million years ago Vi-52

估價:$1.12

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