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The Warrawoona Group is a geological unit in Western Australia containing putative fossils of cyanobacteria cells. Dated 3.465 Ga, these microstructures, found in Archean chert, are considered to be the oldest known geological record of life on Earth. [1] [2] [3]
Conophyton is a genus of stromatolite-forming cyanobacteria from the Neoproterozoic era. Fossils have been found in many countries, including Australia, India, ...
Country Noteworthiness Afar Depression: ... Engis 2 was the first Neanderthal fossil ever found Buñol: Miocene: Europe: ... Cyanobacteria, first Hexapoda [Note 1]
The stromatolites found today are almost all carbonate rocks (made of limestone), but these structures are mostly composed of the minerals gypsum and halite (rock salt), Hynek said.
[216] [217] [218] While it is widely accepted that the presence of molecular oxygen in the early fossil record was the result of cyanobacteria activity, little is known about how cyanobacteria evolution (e.g., habitat preference) may have contributed to changes in biogeochemical cycles through Earth history.
The cyanobacteria live on the surface of the limestone and are sustained by the calcium-rich dripping water, which allows them to grow toward the two open ends of the cave which provide light. [ 56 ] Stromatolites composed of calcite have been found in both the Blue Lake in the dormant volcano, Mount Gambier and at least eight cenote lakes ...
Fossils of K. kulparensis have been found in the Umbertana Group in the northern Yorke Peninsula in South Australia, 4 miles (6.4 km) south of Kulpara. [4]K. alicia fossils have been found in the Loves Creek Member of the Bitter Springs Formation in the Amaedus Basin of Western Australia, 2.3 miles (3.7 km) west-south-west of Jay Creek Aboriginal Settlement.
Girvanella is a fossil thought to represent the calcified sheath of a filamentous cyanobacterium known from the Burgess Shale [1] and other Cambrian fossil deposits. [2] Specimens are also known from the Early Ordovician San Juan Formation, Argentina. [3] Girvanella was originally described as a foraminifera. [4]