Atmospheric carbon dioxide concentrations before 2.2 billion years ago
Article Abstract:
A study has been conducted to examine the concentration of atmospheric carbon dioxide before 2.2 Gyr ago and identify the factors contributing to the present conditions of the atmosphere. A review of studies on paleosols which existed between 2.75 and 2.2 Gyr ago showed that iron from these profiles existed as iron silicates instead of iron carbonates, suggesting that atmospheric CO2 may have been very much lower in concentration than today's atmospheric CO2.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1995
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Meteoritic dust from the atmospheric disintegration of a large meteoroid
Article Abstract:
The disintegration of one of the largest meteoroids to have entered the Earth's atmosphere during the past many years is reported. However, this result is contrary to the usual view that most of the material in large meteoroids is efficiently converted to particles of much smaller size through ablation.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2005
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