The Tarim Craton may have been connected
to the North India Block rather than Australia within the supercontinent of Rodinia during the Tonian.
of mountain building during the Tonian been found in Scotland?
The Tonian/Cryogenian transition seems
to have been located in Svalbard.
How complete is the evidence
of glaciations during the Cryogenian in Scotland?
How oxygenated was the ocean
between the Snowball Earth episodes?
Caution with carbon-13 shifts are urged
in Cryogenian deposits as they are deposit dependent.
Evidence of hydrothermal modification of a dolostone
during the Marinoan Glaciations.
Was there a delayed oxygenation of the oceans
from the Cryogenian to the Ediacaran?
from Mongolia's 540 million year old Khesen formation documents the rise of animals.
Evidence that Ediacaran Parvancorina was motile and could sense
Were there constant
anoxic bottom waters during the Ediacaran?
Cyanobacterial-algal crusts have been found
from Ediacaran paleosols.
Cyanobacterial microfossils are examined
from Calymmian China.
Were tellurium and selenium weathered
from sandstones into the Mesoproterozoic oceans?
Biosignatures have been found
for eukaryotes from Statherian China.
There is evidence of an impact
in India during the Siderian.
Was there a subduction cessation
during the Siderian in China?
More evidence of warm subduction
during the Orosirian from Cameroon.
Was the Great Oxygenation Event really an abiotic process
There appears to have been gradual oxygenation in the oceans
(in some cases) just prior to the GOE.
A large igneous province is detected
from India from the Rhyacian.
Was the early biosphere nutrient limited
from China, specifically the North China Craton, about the composition of NeoArchean sea water.
Inland lakes appear to have fostered the diversification of microbial life
during the MesoArchean.
The oldest known paleosols
(fossil soil) date from the PaleoArchean (3.46 billion years ago) and originate in Australia and may have formed from sulfuric acid weathering.
Could there be a problem
with the cherts being used from the PaleoArchean to claim microbial life?
Or is there a definitive example
of fossil life from the PaleoArchean? Does that mean
life is common in the universe?
Is some of Earth's magma ocean preserved
in PaleoArchean rock?
the Precambrian lithosphere of Zambia and Malawi.
of paleoseawater chemistry on hydrothermal ridges.
Origin of Life:
The origin and diversification of the endosymbiont known as the mitochondria
A new lineage
of eukaryotes has given information on mitochondrial genome reduction.