Pondering the Precambrian #10

NeoProterozoic:

The Ediacaran's Palaeopascichnus linearis appears to be the oldest macroscopic organism.

Exceptinal preservation of biomarkers was found in Ediacaran deposits from the Eastern European Craton.

The paleoenvironmental change gets examined leading up to the Gaskiers Glaciation in the Ediacaran.

The interglacial timeframe in the Cryogenian appears to should anoxic marine waters in South China.

The end of the Cryogenian Sturtian Glaciation according to new dating techniques supports a global and rapid deglaciation consistent with the snowball earth scenario.

At the dawn of the Sturtian glaciation during the Cryogenian, solar activity left no sign of any change.

Stromatoveris appears to be a survivor from the Ediacaran into the Cambrian.

Mesoproterozoic:

During the Stenian, the marine ecosystems were dominated by bacteria.

There is evidence of increased, but still limited biological productivity from the Ectasian/Calymmian boundary in Canada.

Paleoproterozoic:

There is evidence in from an Orosirian lake in Russia, that methanotrophic and autophototrophic biomes lived in the same body of water.

Orosirian micrometer fossils were identified using laser ablation mass spectrometry.

Researchers attempted to model the GOE atmosphere and had an interesting result regarding methane.

Evidence from the Boolgeeda Iron Formation in Australia suggests shallow water oxygenation took place while the iron banded formations were being deposited.

The Kaapvaal Craton shows evidence of subduction at the Archean/PaleoProterozoic Boundary.

Archean:

Shallow waters in South Africa just prior to the Great Oxygenation Event were still anoxic.

The disappearance of certain sulfur compounds appears to make a good proxy for the rise of oxygen in the Archean atmosphere.

There seems to have been intermittent surface ocean oxygenation prior to the Great Oxygenation Event during the NeoArchean.

There is evidence of continental collisions and subduction from the MesoArchean.

There is evidence of bacterial mats inhabiting terrestrial environments during the late PaleoArchean.

There is also evidence of bacterial speciation from the PaleoArchean deposits of Pilbara, Australia.

The Strelley Pool micro fossils from the PaleoArchean appear to be biological.